Cumulative frequency distributions show the accumulated counts up to and including the current bin as the bin limits increase. This means that for each bin, the cumulative frequency distribution includes the number of observations in that bin and any previous bins with lower limits.
If a data set is divided into five bins, and the number of observations falling into each bin are 10, 20, 30, 40, and 50, the cumulative frequency distribution for each bin would be 10, 30, 60, 100, and 150 respectively.
In other words, the cumulative frequency distribution is the total count of observations up to and including the current bin. This makes it easier to see the overall pattern of the data, and can be used to find the median, quartiles, and percentiles of a data set.
It is important to note that cumulative frequency distributions differ from frequency distributions, which only show the number of observations in each bin. Cumulative frequency distributions can also be used to calculate the total number of observations in any bin, including bins that have higher limits.
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Please assist,
2. Determine the scale factor of a dilation that maps Circle A onto a circle congruent to Circle B.
3. Determine the scale factor of a dilation that maps Circle C onto a circle congruent to Circle A.
4. Explain the relationship between dilations and similar figures
2. Scale factor of a dilation that maps Circle A onto a circle congruent to Circle B is: 4/3 . 3. Scale factor of a dilation that maps Circle C onto a circle congruent to Circle A is 1/2.
What is transformation?By rotating, reflecting, or translating a shape on a coordinate plane, a transformation is made. Transformational geometry, a fresh viewpoint on geometry, was first forth by Felix Klein in the 19th century.
The majority of geometric proofs rely on how objects change. Using transformations, we can change any image in a coordinate plane. By using transformational logic, it is possible to comprehend video game graphics more fully.
From the given figure we see that:
Diameter of A = 8
Diameter of B = 6
Diameter of C= 4
2. Scale factor of a dilation that maps Circle A onto a circle congruent to Circle B is:
8/6 = 4/3
3. Scale factor of a dilation that maps Circle C onto a circle congruent to Circle A is:
4/8 = 1/2
4. When a figure is dilated the new figure is similar to the pre-image. The segments, sides, edges, of the new image is dilated by scale factor.
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Which one of the following statements is correct when the homoskedasticity assumption is violated while the rest of the OLS assumptions are correct.?
a.The beta parameter estimates can be calculated but they are wrong.
b.The beta parameter estimates are biased
c.The beta parameter estimates are unbiased because homoskedasticity assumption is not required for unbiasedness.
d.The beta parameter estimates cannot be calculated
The correct answer is option b. When the homoskedasticity assumption is violated, The beta parameter estimates are biased while the rest of the OLS assumptions are correct.
When the homoskedasticity assumption is violated, the ordinary least squares (OLS) estimator is still consistent but no longer efficient. This means that the estimates of the regression coefficients (beta parameters) are still unbiased, but they have higher variances and covariances.
In other words, the OLS estimator is no longer the best linear unbiased estimator (BLUE) and it may be biased when the errors are heteroscedastic. Therefore, option b is correct.
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You moved 5 units north, 3 units west, and ended at point D.
Where did you begin?
A) Point E
B) Point A
C) Point B
D) Point D
The required point of the beginning is given as Point A. Option B is correct.
What is coordinate?Coordinate, is represented as the values on the x-axis and y-axis of the graph. while the coordinate x is called abscissa and the coordinate of the y is called ordinate.
When you move 5 units north, you increase the y-coordinate by 5. When you move 3 units west, you decrease the x-coordinate by 3. So, if you start at an unknown point and move 5 units north and 3 units west, your final position would be at a point with the coordinates (x - 3, y + 5).
Since you ended at point D, and the final coordinates are not given, we cannot determine the starting point without more information.
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A pie chart should always show both the sum of all the pie pieces along with the data that comprise the pie slices.
True or False
The ideal pie charts should always show both the sum of all the pie elements along with the data that constitute the pie slices. Thus the statement in the question is true.
The circle diagram, often known as a pie chart, pie chart, or pie chart, is used to depict qualitative or discrete information. It is used to display the percentage of each variable's values' constituent parts.
To do this, divide the circle into sections proportionate to the relative frequency. Recognize the area of the circle that corresponds to each possible value of the variable as a component. It is characterized as an "exploded cake graph" because it divides the graph into its many components in order to shift one of the portions.
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Find the quotient. 1/4 2 2/3
Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y = e^x, x = 0, y = 3Pie; about the x-axis V =
The x-axis V is if cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis is 488.061745.
V = π/2 [18π² ln[3π] - 9π² + 1]
v = 488.061744630
Volume of the region is V = 488.061745.
The area of a thin cylindrical shell with height dr and radius f(x), where f(x) is the equation of the boundary curve, needs to be integrated over the range of x in order to get the volume produced by rotating a region about the y-axis using the cylindrical shell method.
Here, the interval's lower and higher boundaries are denoted by the letters a and b, while the boundary curve's equation is written as f(x). To acquire the volume, the integration must be run across the specified time frame.
The basic idea behind the cylindrical shell method is to build a series of cylindrical shells by wrapping the area around the y-axis, measure the volume of each shell, and then add all the volumes to get the total volume.
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When the level of confidence decreases, the margin of error
a. Stays the same
b. Becomes smaller
c. Becomes larger
d. Becomes smaller or larger, depending on the sample size
When the level of confidence decreases, the margin of error c. Becomes larger
The margin of error is a gauge of how uncertain a sample-based estimate is. It is impacted by the sample size and level of confidence and shows the potential difference between the estimate and the true population value. The user selects a level of confidence, which is commonly given as a percentage, when we want to generate a confidence interval for a population parameter, such as a mean or proportion. By selecting a degree of confidence of 95%, for instance, we are expressing our confidence that the true population parameter falls inside the interval.
Based on the level of confidence, and sample size the margin of error is determined. In order to account for greater uncertainty, a higher level of confidence necessitates a bigger margin of error, whereas a lower level of confidence necessitates a smaller margin of error. As a result, the margin of error rises as the level of confidence declines, indicating a wider range of values within which the true population parameter is expected to fall.
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i need help with this
The average height and average weight of five students are presented in the table. Height (in cm) Weight (in kg) Student 1 172 62 Student 2 173 65 Student 3 175 64 Student 4 176 66 Student 5 177 65 The calculation for the correlation, r, for this set of five students is __________. Answer choices are rounded to the hundredths place.
The correlation coefficient for this set of five students is approximately 0.95.
How to calculate the correlation coefficient (r) for this set of data.
First we can use the formula:
r = [nΣ(xy) - ΣxΣy] / [√{nΣx^2 - (Σx)^2} √{nΣy^2 - (Σy)^2}]
Where
n is the sample size Σ represents the sum x and y are the variables of interest (in this case, height and weight)xy represents the product of x and y for each observationUsing the values given in the table, we can calculate the necessary sums and products:
n = 5
Σx = 173 + 172 + 175 + 176 + 177 = 873
Σy = 62 + 65 + 64 + 66 + 65 = 322
Σx^2 = 173^2 + 172^2 + 175^2 + 176^2 + 177^2 = 150367
Σy^2 = 62^2 + 65^2 + 64^2 + 66^2 + 65^2 = 20410
Σ(xy) = (172)(62) + (173)(65) + (175)(64) + (176)(66) + (177)(65) = 56209
Plugging these values into the formula for r, we get:
r = [5(56209) - (873)(322)] / [√{5(150367) - (873)^2} √{5(20410) - (322)^2}]
Simplifying the numerator and denominator:
r = [281045 - 280506] / [√{5(150367) - (873)^2} √{5(20410) - (322)^2}]
r = 0.95 (rounded to the hundredths place)
Therefore, the correlation coefficient for this set of five students is approximately 0.95.
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In Exercises 19 and 20, choose h and k such that the system has (a) no solution, (b) a unique solution, and (c) many solutions. Give separate answers for each part. 19. x1 +hx2 = 2 4x1 + 8x2 =k 20. X1 – 3x2 = 1 2x +hx2 = k
The equations must intersect at a single point then it have the unique solution and the value of h and k are h = -1 and k = 6
A system has no solution if the equations are inconsistent, meaning there is no way to satisfy both equations simultaneously. It has a unique solution if the equations intersect at a single point, meaning there is only one set of values that satisfies both equations.
Let's take a look at the first system of equations, 19.
Equation 1: x + hx = 2
Equation 2: 4x + 8x = k
For the system to have no solution, the equations must be inconsistent. This means they must be parallel and never intersect. To achieve this, we can set the slopes of the lines to be equal but the y-intercepts different. In other words, we need to choose h and k such that:
h = -2 and k = 5
Substituting these values into the equations, we get:
Equation 1: x - 2x = 2
Equation 2: 4x + 8x = 5
You can see that these two equations do not have a common solution. They are inconsistent, meaning there is no point that satisfies both equations.
For the system to have a unique solution, the equations must intersect at a single point. This means the slopes and y-intercepts must be different. To achieve this, we can choose h and k such that:
h = -1 and k = 6
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let s(t) be the position of a particle in meters after t seconds. give the best approximate for the instantaneous velocity at 8 seconds. use this to approximate the position of the particle aftter 10 seconds.
The instantaneous velocity of the particle at 8 seconds is approximately the change in position over the change in time, or[tex]s(8+Δt) - s(8) / Δt[/tex]. If we use Δt = 0.1, then the instantaneous velocity is approximately s(8.1) - s(8) / 0.1. The approximate position of the particle after 10 seconds is then s(8) + (10-8) * (s(8.1) - s(8) / 0.1).
The instantaneous velocity of a particle is defined as the change in position over the change in time. This can be represented by the equation [tex]s(t+Δt) - s(t) / Δt[/tex]. Here, s(t) is the position of the particle at time t, and t is a small change in time. To approximate the instantaneous velocity at 8 seconds, we can use Δt = 0.1. This gives us an equation of s(8+0.1) - s(8) / 0.1. This equation gives us the velocity at 8 seconds. To approximate the position of the particle after 10 seconds, we can use the equation s(8) + (10-8) * (s(8.1) - s(8) / 0.1). This equation gives us an approximate position of the particle after 10 seconds, using the change in position over the change in time. This equation gives us a good approximation of the position of the particle after 10 seconds, given the information about the particle's position at 8 seconds.
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The area of a rectangle is given by the equation 2L^2+L=45, in which L is the rectangle's length. What is the length of the rectangle?
Answer:
L = 4.5
Step-by-step explanation:
You can rewrite the equation as 2L^2 + L - 45 = 0 and then solve using the quadratic formula
L = (-1 plus or minus the sq root of 361) / 4
L = (-1 plus or minus 19) / 4
L = -5 or 4.5 but lengths can't be negative so the length is 4.5
Use the confidence level and sample data to find a confidence interval for estimating the population mean, . Round your answer to the same number of decimal places as the sample mean.
Test scores: n = 175, x¯¯¯=81
, σ=11.8
, 98% confidence
ANSWER CHOICES
A.(77, 85)
B.(79, 83)
C.(76, 86)
D.(72, 90)
Answer:
Step-by-step explanation:
We can use the formula for a confidence interval for the population mean:
CI = x¯¯¯ ± z*(σ/sqrt(n))
where:
x¯¯¯ is the sample mean, which is 81.
σ is the population standard deviation, which is 11.8 (assuming the sample is drawn from a normally distributed population).
n is the sample size, which is 175.
z is the z-score corresponding to the desired level of confidence, which is 2.33 for a 98% confidence level.
Substituting the known values, we get:
CI = 81 ± 2.33*(11.8/sqrt(175))
Calculating this expression, we get:
CI ≈ (79, 83)
Therefore, a 98% confidence interval for the population mean is approximately (79, 83).
Therefore, the answer is (B) (79, 83).
A die with six faces has the number 1 painted on three of its faces, the number 2 painted on two of its faces, and the number 3 painted on one face. Assume that each face is equally likely to come up.
(a) Find the sample space for this experiment.
(b) Find P(odd number).
(c) If the die were loaded so that the face with the 3 on it were twice as likely to come up as each of the other five faces:
(i) Find the probability of the single events.
(ii) Find P(even number).
Assuming that each face is equally likely to come up.
(a) The sample space for this experiment = {1, 2, 3}
(b) P(odd number) = 2/3
(c) If the die were loaded so that the face with the 3 on it was twice as likely to come up as each of the other five faces:
(i) The probability of the single events, P(3) = 2/7
(ii) P(even number) = 1/3
(a) The sample space for this experiment is the set of all possible outcomes, which are the numbers 1, 2, and 3 that can appear on the face of the die.
Sample space = {1, 2, 3}
(b) To find the probability of getting an odd number, we need to find the probability of getting a 1 or a 3. There are 3 faces with the number 1 and 1 face with the number 3, so there are 3 + 1 = 4 faces that result in an odd number. There are 6 faces total, so the probability of getting an odd number is 4/6 = 2/3.
P(odd number) = 2/3
(c)
(i) If the die were loaded so that the face with the 3 on it was twice as likely to come up as each of the other five faces, then each of the other five faces would have a probability of 1/7 of coming up, and the face with the 3 on it would have a probability of 2/7 of coming up.
P(1) = P(2) = 1/7
P(3) = 2/7
(ii) To find the probability of getting an even number, we need to find the probability of getting a 2. There are 2 faces with the number 2, so there are 2 faces that result in an even number. There are 6 faces total, so the probability of getting an even number is 2/6 = 1/3.
P(even number) = 1/3
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Divide 36x5 − 44x4 − 28x3 by 4x2.
Answer:-
36*5= 180
44*4= 176
28*3= 84
4*2=8
180-176-84= (-80)
-80/8=(-10)
Step-by-step explanation: Hope this helps. Mark me brainliest :)))
For a project in her Geometry class, Madeline uses a mirror on the ground to measure the height of her school building. She walks a distance of 9.45 meters from the building, then places a mirror flat on the ground, marked with an X at the center. She then walks 2.75 more meters past the mirror, so that when she turns around and looks down at the mirror, she can see the top of the school clearly marked in the X. Her partner measures the distance from her eyes to the ground to be 1.55 meters. How tall is the school? Round your answer to the nearest hundredth of a meter.
Madeline's school building model is 5.33 meter.
What are similar triangles?Two triangles are similar if the angles are the same size or the corresponding sides are in the same ratio. Either of these conditions will prove two triangles are similar.
Given that, Madeline walks a distance of 9.45 meters from the building, then places a mirror flat on the ground, marked with an X at the center.
Use corresponding parts of similar triangles.
Madeline's eyes height/Madeline's distance from x = Buildings height/Buildings distance from X
1.55/2.75 = x/9.45
2.75x=1.55×9.45
2.75x=14.6475
x=14.6475/2.75
x=5.33
Therefore, Madeline's school building model is 5.33 meter.
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find the rank, nullity, and bases of the range spaces and null spaces for each of the following matrices. you must show your work, or explain your thought process; a correct numerical answer is not sufficient.
If A is a matrix of order m × n, then
Rank of A + Nullity of A = Number of columns in A = n
Now, According to the question:
What is rank nullity theorem and range?The rank-nullity theorem states that the dimension of the domain of a linear function is equal to the sum of the dimensions of its range (i.e., the set of values in the codomain that the function actually takes) and kernel (i.e., the set of values in the domain that are mapped to the zero vector in the codomain).
What is range and null space of a matrix?The range null-space decomposition is the representation of a vector space as the direct sum of the range and the null space of a certain power of a given matrix.
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The given question is incomplete,
So, The question is:
What is rank nullity theorem and range and null space ?
Read the following statement: x + y = y + x. The statement demonstrates:
The given statement follows the commutative property.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
The given equation is x+y=y+x
The commutative property states that the change in the order of two numbers in an addition or multiplication operation does not change the sum or the product.
Therefore, the given statement follows the commutative property.
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difference between twice a number and another number is 8, find the minimul product between the two numbers as well as the two numbers
The minimum product between the two numbers is 0 and the two numbers are 4 and 0.
here 1st number is x
and 2nd number is y
and the difference between twice a number and another number is 8 so 2x-y = 8
minimum value of
xy
= x(2x-8)
here the eqn is x(2x-8)
and we have to find its minima
If we have a formula expressed as y= ax2+bx+c , we can find the minimum of the quadratic equation according to the following formula: The minimum value is min= c-b2 /4a.
and the minima is at x=4
here the minimum value will be 0
so either value of x=0 or x= 4;
first number is 4 and second is 0
and product of x*y = 0;
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Are the two triangles similar? How do you know?
A.)no
B.)yes; by AA
C.)yes; by SAS
D.)yes; by SSS
Answer:
No
Step-by-step explanation:
At least two sides will have to be the same.
Solve the system of linear equations using substitution. Use a pencil and paper. Which expression would be easier to substitute into the other equation, in order to solve this problem? Explain your reasoning.
x=4y-9
x+4y=3
Answer:
(- 3, 1.5)
--------------------------
Given system:
x = 4y - 9x + 4y = 3The first expression is ready to be substituted as no further operation is required to simplify it.
4y - 9 + 4y = 38y - 9 = 38y = 12y = 12/8y = 1.5Find x:
x = 4*1.5 - 9x = 6 - 9x = - 3[tex]\sqrt{8} \sqrt{3}[/tex]
We can write the equivalent value of the root expression √8√3 as 2√6.
What is square root of a number?The square root of a number is given by -
y = √x
y² = x
More specifically, we can write -
y = ± √x
Given is the root expression as -
√8√3
We can solve the expression as by finding the square roots of the numbers as -
√8√3 = √8 x √3
√8√3 = √(2 x 2 x 2) x √3
√8√3 = 2√2 x √3
√8√3 = 2√6
So, we can write that -
√8√3 = 2√6
Therefore, we can write the equivalent value of the root expression √8√3 as 2√6.
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Of the people in Maddie's family, 11 have been to Europe and 7 have been to Australia. 5 people have been to both Europe and Australia. How many people have been to Australia but not Europe?
Applying the knowledge of sets, the number of people that have been to Australia but not Europe is calculated as: 2.
How to Use Sets to Solve Word Problems?Let's call the number of people who have been to Europe "E" and the number of people who have been to Australia "A". We know that:
E = 11
A = 7
We also know that 5 people have been to both Europe and Australia, so they are counted in both E and A:
E = 11
A = 7
E ∩ A = 5
To find the number of people who have been to Australia but not Europe, we can use the formula:
A - (E ∩ A) = A - 5 = 7 - 5 = 2
Therefore, the 2 people have been to Australia but not Europe.
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. Order the following numbers from least to greatest: 3√2 , √3 − 1, √19 + 1, 6,
2√10 ÷ 5 and √14.
pls someone help me
The required order from least to greatest is √3 − 1, 2√10 ÷ 5, √14, 3√2, √19 + 1 and 6
What is ascending order?An arrangement of numbers in which the numbers are arranged from smallest to greatest numbers is called ascending order.
Given that, some numbers, 3√2, √3 − 1, √19 + 1, 6, 2√10 ÷ 5 and √14.
We need to order them from least to greatest,
3√2 = 4.24
√3 − 1 = 0.73
√19 + 1 = 5.35
6
2√10 ÷ 5 = 1.26
√14 = 3.74
The order from least to greatest is :-
0.73, 1.26, 3.74, 4.24, 5.35 and 6
i.e.
√3 − 1, 2√10 ÷ 5, √14, 3√2, √19 + 1 and 6
Hence, the required order from least to greatest is √3 − 1, 2√10 ÷ 5, √14, 3√2, √19 + 1 and 6
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Minka pours cup of milk on her oatmeal each day
for 7 days. Complete the number line. Draw a point
and write the number of cups that Minka pours as a
mixed number.
The number of cups of milk that Minka pours as a mixed number is found in the attached image.
What is the total number of cups of milk that Minka pours into her oatmeal?The total number of cups of milk that Minka pours into her oatmeal is calculated as follows:
First day = 1/4
Second day = 1/4 + 1/4
Second day = 2/4
Third day = 1/4 + 2/4
Third day = 3/4
Fourth day = 1/4 + 3/4
Fourth day = 4/4 or 1
Fifth day = 5/4 or 1/4 + 1
Fifth day = 1 1/4
Sixth day = 1/4 + 5/4
Sixth day = 1 1/2
Seventh day = 1/4 + 6/4
Seventh day = 7/4 or 1 3/4
Eight day = 1/4 + 7/4
Eight day = 8/4 or 2
The completed number line is found in the attached image
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What is the solution, if any, to the inequality |3x| >=0?
Answer:
Step-by-step explanation:
The inequality |3x| >= 0 simply states that the absolute value of 3x must be greater than or equal to zero.
Since the absolute value of any number must always be non-negative, this inequality is always true. That means any real number x satisfies the inequality |3x| >= 0.
Therefore, the solution to the inequality |3x| >= 0 is x ∈ R, where R represents the set of all real numbers.
Identify the domain of the function shown in the graph. A. x>0 B. x is all real numbers. C. -6≤x≤6 D. 0≤x≤8 16 11 EN 198 1 3 -8 15
The domain of the function is -6 ≤ x ≤ 6.
What is domain of a function?The domain of a function is the set of its possible inputs, i.e., the set of input values where for which the function is defined.
A function is defined as the relationship between input and output, Where each input has exactly one output. The inputs are the elements in the domain. The co-domain of the function is the set of output values.
From the graph given the possible input values of x lies from -6 to 6.
Hence, the domain of the function is -6 ≤ x ≤ 6.
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Mr. Utivich needs to buy an equal number of canvasses and paint sets for a community center art class. Each canvas costs $4 and each paint set costs $7.25. If he has $120 to spend on the art supplies, then the inequality 4x+7.25x≤120
can be used to find the number of each item he can buy. How much money will he have left after buying the greatest number of canvasses and paint sets?
Answer:
Step-by-step explanation:
23x
A yogurt stand gave out 200 free samples of frozen yogurt, one free sample per person. The three sample choices were vanilla, chocolate, or chocolate & vanilla twist. 162 people tasted the vanilla and 115 people tasted the chocolate, some of those people tasted both because they chose the chocolate and vanilla twist. How many people chose chocolate and vanilla twist?
Answer:
77
Step-by-step explanation:
(V ∪ C) = V + C - (V ∩ C)
This is the same as: (V or C) = V + C - (V and C)
(V ∪ C) represents the number of people that chose chocolate or vanilla (or possibly both)
(V ∩ C) represents the number of people that chose chocolate and vanilla twist.
(V ∪ C) = V + C - (V ∩ C) ⇔ 200 = 162 + 115 - (V ∩ C)
(V ∩ C) = 162 + 115 - 200 = 77
Can someone help me with these questions
The minimum wage increased by approximately 13.43% from 1987 to 1988.
The minimum wage increased by approximately 3.88% from 2004 to 2005.
How to find the percentage increasea) Assuming minimum wage increased from $3.35 per hour in 1987 to $3.80 per hour in 1988.
To calculate the percent increase, we can use the formula:
percent increase = (new value - old value) / old value * 100%
percent increase = (3.80 - 3.35) / 3.35 * 100% = 13.43%
b) Assuming minimum wage increased from $5.15 per hour in 2004 to $5.35 per hour in 2005.
percent increase = (5.35 - 5.15) / 5.15 * 100% = 3.88%
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