a sample of 500 schools in a state results in an average number of students per grade level of 178.6 students, with a margin of error of 45.2 if there are 3250 high schools in the state, what is the estimated number of students per grade level?​

Answers

Answer 1
To estimate the number of students per grade level in the state, we can use the sample average and the margin of error to construct a confidence interval.

The margin of error is given as 45.2, which means that we can be 95% confident that the true population average number of students per grade level falls within the range of the sample average plus or minus the margin of error.

So, the confidence interval is:

178.6 ± 45.2

To estimate the population average number of students per grade level, we can take the midpoint of the confidence interval:

(178.6 + (178.6 - 45.2)) / 2 = 311.6

Therefore, the estimated number of students per grade level in the state is 311.6

Related Questions

he number line shows the solution set of which inequality?
A horizontal number line is labeled from 51 to 52. There is a closed circle at 51.52, and the number line is shaded to the right of 51.52.

A. j/4.6 > 11.2
B. j/1.5 > 16.3
C. j/12.7 > 19.6
D. j/1.4 > 1.1

Answers

Answer: B hope is correct

Can you help meeee pleasE?????

Answers

Answer: supplier a: 30x + 70 y = 4170

Supplier b :25 x + 85y= 4675

Step-by-step explanation:

x = the number of inkjet printers at the company

Y= the number of laser printers

Part A; 30x 79y
Part b:25x 85y

Please could someone help me?

Answers

Answer:

The large box weighs 61/4 Kg and the small box weighs 25/4 Kg

Step-by-step explanation:

Assume the large box is x and the small box is y

6x+2y=104, 3x+5y=77 therefore, 6x+2y=104, 6x+10y=154

8y=54 y=25/4 x=61/4

Four swimmers are training for a relay race. Each day they practice by swimming at least 1,600 yards total. The friends evenly divide the number of yards they swim.

Write and solve an inequality to determine how many yards each friend will swim. Show all your work.

Answers

Answer:1600/4=400

Step-by-step explanation:

Can someone pls help this is due today before 6!

Answers

Answer: .25

Step-by-step explanation:

on x bar 0 and y bar 0 connect them at a 90 angle and from the middle that go diagonal top right.

The Gilberts are you designing a rectangular patio for their backyard. The patio has an area of 432 square feet. The width of the patio is 3/4 its length. What is the length of the patio?

A: 15 feet
B: 24 feet
C: 36 feet
D: 270 feet

Answers

Answer: B: 24 feet.

Step-by-step explanation:

Let's assume that the length of the rectangular patio is "L" feet. Then, the width of the patio would be 3/4 L.

The area of a rectangle is given by the formula A = L x W, where A is the area, L is the length, and W is the width. We know that the area of the patio is 432 square feet. Substituting the values of L and W, we get:

432 = L x (3/4 L)

Multiplying both sides by 4/3, we get:

(4/3) x 432 = L^2

Simplifying, we get:

576 = L^2

Taking the square root of both sides, we get:

L = ±24

Since the length cannot be negative, the length of the patio is 24 feet.

Therefore, the correct answer is option B: 24 feet.

B 24ft
X length
Width is 3/4x
X times 3/4x =432

Triangle ABC is a scale drawing of Triangle XYZ, as shown.

Based on the information shown in these triangles, which of the following is a true statement?
A) The length of side XZ is 11.5.
B) The length of side XZ is 28.
C) The measure of angle A is equal to the measure of angle Z.
D) The measure of angle A is not equal to any of the angle measures of Triangle XYZ.

Answers

A) false
B) false
C) true
D) false
false false true true, but the last one might be false

Solve the word problem and ratio table

Answers

4)

1, 3, 7, 18, 10, 4

6, 18, 42, 108, 60, 24

Ratio was 1:6

5)

2, 4, 6, 8, 10, 7

6, 12, 18, 24, 30, 21

Ratio was 1:3

6)

2, 4, 6, 8, 1, 10

5, 10, 15, 20, 2.5, 25

Ratio was 1:2.5

Unfortunately, you have to do the graph yourself.

Hope this helped!

Mrs. Irons places the names of each of her four children in a hat at one time. She randomly draws a name, places it back in the hat, and draws again. The results are shown in the table below.

What is the experimental probability of selecting the name Alex?

Answers

Answer:

As a Fraction : 4/10

As a Decimal : 0.4

pls help again with these chapes

Answers

Pretty sure it’s 6162
6162 I believe that’s correct

Saturn's moon, Titan, has a radius of 2575 kilometers, which is covered by a 600-kilometer atmosphere. How much of the moon's volume is atmospheric haze?

Answers

Answer:

approximately 4.57 × 10^10 km^3 of Titan's moon is atmospheric haze.

Step-by-step explanation:

The answer is about [tex]4.57[/tex] × [tex]10^1^0[/tex] [tex]km^3[/tex] of the titan moons atmospheric haze.

Step-by-step explanation:

I did the test and got it right

hope this helps :)

Solve the word problem below

Answers

Solution

The distance is going by 30 and then u divide that by 60

Explanation

150+30=180 distance

180/60=3 hours

U go like this till u get till 4.5 hours
If a can of paint can cover 600 square inches, how many cans of paint are needed to cover 1,880 square inches

The sanctuary′s gift shop purchases items for the amounts shown in the table. Leo marks up the cost of each item by 45% to determine the gift shop′s selling price. How much would a customer pay for one pair of binoculars and one bird guide after the markup and 8.5% sales tax? Explain.

Answers

Step-by-step explanation:

The customer pays an amount of $26.74 for one pair of binoculars and one bird guide after the mark-up and 8.5% sales tax

What is the percentage?

The percentage is defined as a ratio expressed as a fraction of 100.

According to the given, the required solution would be as:

Mark up for binoculars = 10 x 1.45 = 14.50

14.5 x 1.085 = 15.7325 in sales tax

The total cost per binocular is $15.73 ($).

Bird Guide Commission = 7 x 1.45 = 10.15

10.15 x 1.085 = 11.01275 Sales Tax

The total cost per Bird Guide is $11.11 ($).

The addition provides one of each.

⇒ 15.73 + 11.01 = 26.74

Thus, the customer pays an amount of $26.74 for one pair of binoculars and one bird guide after the mark-up and 8.5% sales tax

What are the coordinates of the image of (1, 3), where R(−3, 5) is the center of dilation with scale factor 0.5?

PLS ANSWER QUICK

Answers

Answer:

the coordinates of the image D are (-1, 4)

Step-by-step explanation:

To find the coordinates of the image D, we need to apply the dilation transformation centered at R(-3, 5). Let the scale factor be k.

The x-coordinate of D will be shifted k times the distance between 1 and -3, which is 4 units, from the x-coordinate of R, which is -3. So we have:

0.5 = -3 + k(4)

Solving for k, we get:

k = 1.375

Similarly, the y-coordinate of D will be shifted k times the distance between 3 and 5, which is 2 units, from the y-coordinate of R, which is 5. So we have

R: (x, y) = (-3, 5)

D: (x, y) = (-3 + 1.375(1 - (-3)), 5 + 1.375(3 - 5))

D: (x, y) = (-1, 4)

Therefore, the coordinates of the image D are (-1, 4), which is option D.

(-1,4) are the coordinates of the image

Could someone help me fast

Answers

Answer:

A movie is $2.5

A video game is $6

Step-by-step explanation:

Pre-Solving

We are given that Ann had rented 2 movies and 5 video games for a total of $35.

We also know that she also rented 8 movies and 3 video games for a total of $38.

We want to know how much a movie costs, and how much a video game costs.

If a movie costs x dollars, then a video game costs y dollars.

Solving

This means that costwise, 2 movies will cost 2x, and 5 video games will be 5y.

8 movies will cost 8x, and 3 video games will cost 3y.

So, we will have two equations:

2x + 5y = 35

8x + 3y = 38

We now have this system of equations, which we can solve.

Let's solve this by elimination.

To eliminate, we need to clear one of the variables, and solve for the other one.

To do this, we need to make sure that one variable has the same coefficient with opposite signs (e.g. -3x and 3x). We might need to multiply one equation by a number in order to achieve this.

We can multiply 2x + 5y = 35 by -4.

-4(2x + 5y) = -4(35)

-8x - 20y = -140

We can rewrite the equations:

-8x - 20y = -140

8x + 3y = 38

They can be added together. The result will be:

-17y = -102

Divide both sides by 017.

y = 6

We found y, but now we need to find x.

We can substitute 6 as y into 2x + 5y = 35 or 8x + 3y = 38 to find x.

Taking 2x + 5y = 35 for instance:

2x + 5(6) = 35

2x + 30 = 35

Subtract 30 from both sides.

2x = 5

Divide both sides by 2

x = 2.5

Recall that x = price of a movie, and y = price of a video game.

Therefore, a movie is 2.5 dollars, and a video game is 6 dollars.

a movie is $2.50

and a snack is $6

Help asap!!! Easy math!!! Offering brainiest!!!

Answers

Answer:

64

27

6

15

Step-by-step explanation:

64 is a cube and is even,

27 is a cube and not even,

6 is not a cube and is even,

and finally 15 is a not a cube and is not even,

I think the even part is 64 ‍♂️

What's the median for these set of numbers and do it step by step explanation. 3,2,3,4,3,5,7,5,4

Answers

The answer is 3 it’s the one in the middle.
I hope this helps! The median is just the number exactly in the middle, but if u have 2 in the middle, you can substract them from each other, halve that number and add it to the smallest number that’s in the middle.

HELPPPPPPPP
If f(x) = 2x - 5, then f(4) is _____.

17
3
4
5
If f(a) = 3a – a2, which of the following are not true statements?

Select all that apply.

f(-5) = -40
f(4) = -4
f(-1) = 2
f(0) = 3
f(3) = 0

Answers

Answer:

1st is 3, 2nd i didnt learn this sorry

Step-by-step explanation:

F(4)=2(4)-5

f(4)=8-5

So, f(4) =3

Answer for #1 is 3
Question number 2 is a bit difficult I’m sorry.

How can we use the distributive property to find an expression equivalent to 4(5−3x)
? Place the steps in order.

Answers

Answer:

Multiply 4 by  5 and 4 by 3x

Step-by-step explanation:

4 ( 5 -3x ) =

4 x 5   +   (4)(-3x)

Answer:

4(5-3x)

4(5) -4(3x)

20-12x

could ya please help me?

Answers

Answer:the trcks what to do that much because 20 avb=vd 55 is 899

Step-by-step explanation:

20 55 800 I believe that’s the answer

Maggie reads 1/3 of a book every 3/4 of a week.
How many books does Maggie read per week?
____
(A) 4/9 of a book
(B) 4 books
(C) 2 1/4 books
(D) 1/4 of a book

Answers

Answer:

i think it may be B

Step-by-step explanation:

K12 sorry if its wrong

Answer:

О  (A)  4/9 of a book.                                

Step-by-step explanation:

(1/3) / (3/4) = (1*4) / (3*3)

= 4/9

...

4. Chris and Keith went to a carnival. Chris started with 80 tickets and spent x tickets at the carnival, Keith started with 140 tickets and spent 2x tickets at the carnival. At the end of the night, they had the same number of tickets left over. How many tickets did Chris spend at the carnival?​

Answers

Answer: x=20

Step-by-step explanation:

3x+80=140

3x=60

x=20

Answer: Chris spent 60 tickets at the carnival.

Step-by-step explanation:

At the end of the night, both Chris and Keith had the same amount of tickets, so:

80 - x = 140 - 2x

Now, solve the equation. Start by bringing the -2x to the left side.

80 - x + 2x = 140

Bring the 80 to the right side so the variables are isolated.

-x + 2x = 60

Add like terms.

x = 60

Check the work.

Chris had 80, spent 60, so had 20 left. --> 80 - 60 = 20

Keith had 140, spent 120 (60 *2), so also had 20 left. --> 140 - 120 = 20

So, Chris spent 60 tickets at the carnival.

Drag each expression to show whether it is equivalent to 36x+9
or 9(4x−1)
.

Answers


In order to find out what 36x + 9 is equivalent to,, we must factor out 9 from the expression. Once we do this you will find that this expression is equivalent to 9(4x + 1),, or option E.
Next we will look at the expression 9(4x-1). In order for us to find out the equivalent to this expression,, we must first multiply each term in the parenthesis by 9.
9 × 4x - 9
Now calculate the product
36x - 9
This means that the equivalent for this expression is
36x - 9,, or option A.
Lastly,, we will look at the final expression given which is 4(9x + 2). The first step for finding the equivalent of this expression is to multiply the numbers in the first parenthesis together.
(36x) + (4 × 2)
Now multiply the numbers in the second parenthesis together.
(36x) + 8
Remove the parenthesis
36x + 8
Now factor out 4 from the expression to get your final answer.
4(9x + 2)
This means that the last expression is equivalent to 4(9x + 2),, or option C.
Let me know if you have any further questions
C because the last expression is equivalent to 9(4x-1).

ANSWER? PLSSSSSSSSSSSSSSSSSSS

Answers

Answer: I might be wrong, but I think its just $53.50

The answer is $53.50

Solve the word problem below

Answers

Answer:

View the image above

Step-by-step explanation:

Distance = 60 miles per hour

Time = ?

Distance = 150

Time = 2/120 × 150 = 2.5

Solve the rest!

Have a nice day!!!

the distance would be: 150, the time would be: ?

What number is 40% of 86? Show your work.
21.5
344
34.4
215

Answers

215

To solve this problem you multiply 86 by 100 and then divide the total by 40 as follows: (86 x 100) / 40

Answer:

What is 40% of 86? Show your work.

= (40*86)/100

= 3440/100 = 34.4

C. 34.4

Step-by-step explanation:

You're welcome.

Triangle ABC is a scale drawing of Triangle XYZ, as shown.
Based on the information shown in these triangles, which of the following is a true statement?

A) The length of side XZ is 11.5.
B) The length of side XZ is 28.
C) The measure of angle A is equal to the measure of angle Z.
D) The measure of angle A is not equal to any of the angle measures of Triangle XYZ.

Answers

Answer: B the side length of XZ is 28

Step-by-step explanation:

to find the scale factor, one of the methods is to divide the side length of one triangle by the same side length of the other triangle.

for example with this problem, the length of XY is 42 while side length AB is 12. 42/12 is 3.5. we know that the side length that corresponds with XZ is 8 so multiply it by 3.5 to get the answer of 28.

Answer:

B

Step-by-step explanation:

Since we know that triangle XYZ is a scale model of ABC then if we find the amount XYZ is bigger then ABC then we can find the answer. Line CB is the corresponding line to ZY and ZY is 3.5x greater then CB. Apply the same logic to AC and we get 8*3.5=ZX 8*3.5=28 so ZX=28.

i need even more help

Answers

Perimeter:
l + w + l + w
2 • l + 2 • w
2(l + w)

Area:
wl
l • w

Neither:
l + w

Answer: hope this helps ♡

Perimeter:

2(l + w)       &       2×l + 2×w        &        l + w + l + w

Area:

l × w       &       wl

Neither:

l + w

If Mars' core has a mass of 1.54 x 1023 kg and a radius of 1,830 km, as measured by InSight. What is the density of the core?

Answers

Answer:

930 and 1300 miles ( 1500 to 2100 kilometers) in radius

Step-by-step explanation:

What is the median of the data set represented by the dot plot?

Answers

4.5?? I’m not entirely sure though

Answer: 5

Step-by-step explanation:

The median is the middle number of a group of numbers. So, to find the median, first, find out how many numbers there are. You can do this on the dot plot by counting the dots. There are 9 dots.

To find the middle number when the total is odd, you can drop the number down to an even number that will divide in half (or divide the number by two). In this case, you can drop the number to 8 and divide by two. The answer to that is 4. Because there was an odd number of dots, you should use the 4th and then the 5th numbers to determine the middle number. We also count the 5th number because the total was odd. If the total is even, use only one number as the middle number.

Since the 4th and the 5th number are lined up on the 5, that is the median number.

(If you ever have to find two numbers that are not lined up on the same number, you have to add those two numbers and divide by 2 to find the median.)

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Its distance in feet, d.above the water is given by the equation:d-20+90t-16t^2, where t is the time in seconds after the launch.Drag statements to the table to show what each coordinate labeled on the graphrepresents in this problem situation.the height of the stone when it is launchedthe time when the stone hits the waterthe time when the stone is launched the maximum height of the stonethe time when the stone reaches its maximum heightCoordinateAthe height of the stone when it hits the waterWhat the Coordinate RepresentsDRAG AND DROPAN ITEM HEREDRAG AND DROPAN ITEM HEREDRAG AND DROPDRAG AND DROP what types of bonds are occurring at the origin between the enzyme and the dna backbone having to do with worldly, rather than religious matters is called? simplest schedule of reinforcement and happen when a specific consequence follows each and every occurrence of a desired behavior. A man laid on a pool lilo has a surface area of 2m and a weight of 900N. Calculate the pressure. 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The cell phone provider was using a ________ strategy.A) product line pricingB) captive pricingC) price bundlingD) reference pricingE) prestige pricing european pastries has an isurable loss of 82,500, while having insurance coverage beyond coinsurance reuirements. the insurance is divided between company a with $125,000 coverage, company b with $100,000 coverage, and company c with 175,000 coverage. find the amount of loss paid by each of the insurance companies 5 2.4 Discuss the impact that increasing number of social grants may have on: 2.4.1 Unemployment rate 2.4.2 Teen mothers Amir and Brandon are sharing a cake they bought for 10 dollars. Half ofthe cake is chocolate and half of the cake is vanilla. Amir likes chocolatetwice as much as vanilla. Brandon likes chocolate four times as much asvanilla. They decide to use the divider-chooser method to share the cake. (a) Give a way Amir might split the cake if hes the splitter. State whichpiece Brandon would choose and how much its worth to him. (b) Give a way Brandon might split the cake if hes the splitter. Statewhich piece Amir would choose and how much its worth to him water moved across a membrane, into the thistle tubea.Down its concentration gradientb.Creating intensen osmotic pressurec.Up its concentrationgradientd.Randomlye.Which had a dictinct effect on the pH of the sugar solution fill in the blank. the risk of a car bomb in a bank is about 1% whereas there is a 60% chance of an attack Data previously collected for purposes other than the one at hand are an important source of information as the researcher defines the problem. These data are called ______ data Which of the following are examples of issues subject to culture lag in some religions? (Choose every correct answer.)A. transgender rightsB. moneyC. unmarried couples living togetherD. rites and sacraments