The management of a large hardware store is interested in estimating the difference between the mean dollar amount of purchases made by customers who use the store’s credit card and the mean dollar amount of purchases made by customers who use a different credit card. a random sample of 74 customers who used the store’s credit card showed a mean purchase of $107 with a standard deviation of $12. a separate random sample of 58 customers who used a different credit card showed a mean purchase of $132 with a standard deviation of $9. technology was used to calculate that the correct number of degrees of freedom is 129.78.
The margin of error for a confidence interval of 98% that should be used to estimate the difference in the mean purchase is given by [tex]2.355\sqrt{\frac{12^2}{74} +\frac{9^2}{58} }[/tex]
What is a confidence interval?In Statistics, a confidence interval refers to a range of estimated values that defines the probability that a population parameter will lie within it.
This ultimately implies that, a confidence interval is an estimate of a range of estimated values (lower bound and an upper bound) that may contain a population parameter.
For a confidence interval of 98%, we have;
[tex]\alpha =1-0.98\\\\\alpha =0.02[/tex]
Therefore, the margin of error for a confidence interval of 98% that should be used by the management to estimate the difference in the mean purchase amount for these credit cards is given by:
[tex]2.355\sqrt{\frac{12^2}{74} +\frac{9^2}{58} }[/tex]
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The population of a town after t years is represented by the function (t)=7248(0. 983)t. What does the value 0. 983 represent in the situation?
Answer:
Exponential function: A function is in the form of; where a is the initial value and b is a factor which decides the exponential function increases or decreases.
If
0<b <1 , then the exponential function decreases.
b> 1, then the exponential function increases.
Given the function:
Since this function f(t) represents the population of a town after t years.
Also, it is an exponential function.
here, b = 0.983 < 1
So, the function f(t) would be decreased by a factor of 0.983.
Therefore, the value 0.983 represents, the population of the town is 0.983 times the population of the town in the previous year.
Explanation:
Social worker danaya was not exposed to actual community action programs earlier
When a weak acid (ha) is titrated with a strong base, such as naoh, what species are decreasing in concentration before the equivalence point is reached?
Based on the titration, the species that are decreasing in concentration before the equivalence point is reached are [tex]HA \;and \;H^+ (H3O^+)[/tex]
What is an equivalence point?An equivalence point can be defined as the point in a titration wherein the amount of reagent (titrant) added sufficiently neutralizes the analyte (titrand) solution.
This ultimately implies that, an equivalence point is the amount of strong acid that is needed or required to completely neutralize a weak base.
In this scenario, the species of chemical element and compound that are decreasing in concentration before the equivalence point is reached include the following: [tex]HA \;and \;H^+ (H3O^+)[/tex]
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Three contemporary events transforming south africa
Answer:
Answer is stated below
Explanation:
1.The contemporary events that are showcasing the transforming South Africa are it's diversity communication and training in all the workplaces.
2.Accelerated corporate interest in this field is monitored by government of the country.
3.Previously the diversity work was frought with pitfalls but now it is not the situation.
Therefor, these events shaped Africa into the amazing continent it is today.
What is the mood of the excerpt? terrified angry sorrowful disgusted
Answer:
A. terrified
Explanation:
Global warming is caused only by natural factors true or false
Answer:
False
Explanation:
We as humans pollute and toxicate the air and ozone layers with many harmful gases, like CO² and greenhouse gases.
Identify the relative molar amounts of the species in 0. 10 m kno3(aq). If the species are present in equal amounts, place them in the same box
The relative molar amounts of the given species are;
KnO₃ = 0 M
K⁺ = NO₃⁻ = 0.1 M.
H₃O⁺ = OH⁻ = 1 × 10⁻⁷ M
H₂O = 55.56 M
What is the Relative Molar Amount?
KnO₃ → K⁺ + NO₃⁻
In this dissociation, we see that 1 mole of KnO₃ produces 1 mol of K⁺ and 1 mol of NO₃⁻.
Thus, concentration of KnO₃ is 0 M while the concentration of K⁺ and NO₃⁻ are both 0.1 M.
Now, concentrations of H₃O⁺ and OH⁻ depends solely on the autoionization of water.
Thus, concentration of H₃O⁺ is equal to concentration of OH⁻ = 1 × 10⁻⁷ M. Finally, concentration of H₂O is calculated from it's (1 g/mL) and molar mass of H₂O is 18 g/mol. Thus, concentration = (1/18) * 1000= 55.56 M
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Based on past results and behaviour, supal company found that demand for its product varies inversely with the price of the product. If in 2002, the demand was 1600 units when the price was rs. 5 per unit, what will the demand (to the nearest unit) be in 2012 when the price is rs. 25 per unit?
The demand (to the nearest unit) in 2012 when the price is rs. 25 per unit is 320 units
Inverse variationLet the demand be represented as "d
Let the price of the product be represented as 'p"
If the product varies inversely with the price of the product, this is expressed as:
d = k/p
k is the variation constant
If in 2002, the demand was 1600 units when the price was rs. 5 per unit, then;
1600 = k/5
k = 5(1600)
k = 8000
In order to get the demand (to the nearest unit) in 2012 when the price is rs. 25 per unit;
d = k/p
d = 8000/25
d = 320
Hence the demand (to the nearest unit) in 2012 when the price is rs. 25 per unit is 320 units
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Is the process of providing knowledge and tools for people that enable them to protect their health.
Answer:
Health promotion is the process of providing tools and knowledge for individuals, which allows them to protect their health.
Explanation:
It allows people to enhance their control over their own health.
Dr. North is a busy doctor who also has three kids. Based only on this information, which source of stress is she most likely suffering from?
A basketball coach is investigating whether the number of shots taken can be used to predict the mean number of points scored. Assuming the conditions for inference have been met, which of the following inference procedures is the most appropriate to estimate the mean change in the number of points scored for each increase of 1 shot taken?
Answer:
matched pairs
Explanation:
How does sancho know which locker is william's? the gym lady told him. Bolsa lead him to it. Sancho looked it up in the gym records. There is a sign with his name on it
Answer:
There was a sign with his name on it
Explanation:
I just took the quiz and got it right
Sancho knows which locker is William's because there is a sign with William's name on the locker; that is the last option as the name indicates that it is of his, and mentioning the name on the locker is generally normal.
What is a locker?Lockers are often used in environments where people need a secure and private place to store their belongings. For example, in schools, students may use lockers to store textbooks, binders, and personal items such as clothing and sports equipment. In gyms, lockers are often used to store personal items such as wallets, phones, and gym clothes. They can also be used in workplaces, such as factories or construction sites, to store tools and equipment securely.
Hence, Sancho knows which locker is William's because there is a sign with William's name on the locker; that is the last option.
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For your next task, you will write a story which relates the events of your life from past, present and future to the life cycle of a star. use also those elements which could symbolize something or anything in your story. (use another sheet of paper for this task).
I don't know anything to share
Martin receives an e-mail about a money-making opportunity from a sender who asks for his bank account number. The best way to avoid having his identity stolen is to
Answer:
Answer:D contact the police and file a phishing report
Explanation:
The best way to avoid having his identity stolen is to contact the police and file a phishing report. Thus, option D is correct.
What is e-mail?
E-mail is a browser program that allows users to communicate with one another through the transmission of emails. Communicate and exchange emails fast thanks to a global email network. it provides a person with excess tasks in an over manner.
The technological equal of both a letter is e-mail, which offers benefits in mobility and immediacy. As the email that he has been receiving is a false email this such as that the person need to go to the police and report a complaint as they may be a fraudulent person and having those in may identity of the data that is being preserved like the account number. Therefore, option D is the correct option.
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The question is incomplete, the complete question will be:
contact the government and report the e-mail.
delete the e-mail and mark it as spam.
open the e-mail and follow the steps outlined.
contact the police and file a phishing report.
Margo made the box plots to compare the number of calories between her morning snacks and her afternoon snacks. Select from the drop-down menu to correctly complete the statement. Margo’s typical afternoon snack has about choose. More calories than her typical morning snack
Answer:125
Explanation:I just took the test
Answer:
The answer is 50, more than
Explanation:
I just took the test and that was the answer.
Use a calculator to approximate each value in decimal degrees.
How do the allusions in this excerpt reinforce the meaning of the poem? the allusions clarify specific geographic orientation. The allusions emphasize historical achievements. The allusions recall troublesome international issues. The allusions recount specific battles from recent wars
The way that the allusions in the excerpt reinforce the meaning is that; C. The allusions recall troublesome international issues
What is the meaning of the allusions?An allusion is defined as a figure of speech that represents a reference in a text to someone or something outside that text.
Now, in this given excerpt, we see that there was a plan to throw big Asia in one giant Load & then wash out the blood & Agent Orange. Secondly, there was a plan to dump the whole mess of Russia and China in the wringer.
In conclusion, the way that the allusions in the excerpt reinforce the meaning is that the allusions recall troublesome international issues.
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Answer: The person above is correct.
Explanation:
Which of the following are characteristics of chytridiomycota? check all that apply. Flagellated spores spores produced in the ascus lack reproduction phase important in the food industry important in the digestion of animals can cause disease in plants can cause disease in animals which of the following are characteristics of ascomycota? check all that apply. Flagellated spores spores produced in the ascus lack reproduction phase important in the food industry important in the digestion of animals can cause disease in plants can cause disease in animals
The characteristics of chytridiomycota will include the following:
flagellated sporesimportant in the digestion of animals can cause disease in plants can cause disease in animalsWhat are Chytridiomycota?Chytridiomycota, which are commonly referred to as sac fungi, are a division of zoosporic organisms in the kingdom Fungi. They are also known as chytrids.
Chytridiomycota live parasitically and saprophytically that possess flagellated spores. They can cause harm to human produce also and also animals.
Therefore, the characteristics of chytridiomycota will include the following:
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Answer:
Explanation:
The characteristics of Chytridiomycota are:
flagellated spores
important in the digestion of animals
can cause disease in plants
can cause disease in animals
The characteristics of Ascomycota are:
Spores produced in the ascus
important in the food industry
can cause disease in plants
I took the assignment on edge, I hope this helps :)
Complete the following steps to calculate the altitude of the parallelogram using area methods. The area of the sheet of paper is square inches. The combined area of the triangle cutouts is square inches. The area of the parallelogram is square inches. The altitude of the parallelogram rounded to two decimals is square inches
Based on the calculations, we have the following:
The area of the sheet of paper is 96 square inches.The combined area of the triangle cutouts is equal to 36 square inches.The area of the parallelogram is equal to 60 square inches.The altitude of the parallelogram is equal to 6.51 square inches.Given the following data:
Dimension of paper = 12-inch by 8-inch.How to calculate the paper's area.Mathematically, the area of the paper is given by this formula:
[tex]Area = length \times breadth\\\\Area = 12 \times 8[/tex]
Area = 96 square inches.
For the four (4) right triangles:
Dimension 1 = 2 inches by 9 inches.Dimension 2 = 3 inches by 6 inches.Therefore, the combined area of the triangle cutouts is given by:
[tex]A_2= (2 \times \frac{1}{2} \times 2 \times 9) + 2 \times \frac{1}{2} \times 3 \times 6\\\\A_2=18+18\\\\A_2=36\;in^2[/tex]
The area of the parallelogram.This would be determined by subtracting the area of the four (4) right triangles from the areas of the paper as follows:
[tex]P = A_p -A_2\\\\P=96-36[/tex]
P = 60 square inches.
The altitude of the parallelogram.[tex]P = base \times altitude\\\\Altitude =\frac{P}{base} \\\\Altitude =\frac{60}{9.22}[/tex]
Altitude = 6.51 square inches.
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Complete Question:
A parallelogram is cut out of a 12-inch by 8-inch sheet of paper. There are four right triangle remnants. Two have the dimensions 2 inches by 9 inches, and the other two have the dimensions 3 inches by 6 inches. The resulting parallelogram has a base of approximately 9.22 inches.
Answer:
1: 96
2: 36
3: 60
4: 6.51
Explanation:
trust
in a distribution where the mean is to the right of the median, the histogram of the distribution will probably
Answer:
Skew right
Explanation:
In any data set where the mean is to the right of the median, that means the data skews right. You can use the saying "the mean follows the skew" to apply this to other distributions.
Big ideas math: a common core curriculum (red edition) answers
A conditional statement, symbolized by p → q, can be written as an “if-then
statement” in which p is the hypothesis and q is the conclusion. Here is an example.
hypothesis, conclusion,
If a polygon is a triangle, then the sum of its angle measures is 180 .
p q
°
A collection of organisms that belong to different populations but all live in the same area and interact with one another
If you can't swim you are not allowed in the deep end
Answer:
no u r
Explanation:
bc no one knows that u cant swim
and if u do go for a "swim" u r more likely to die or drown
Which of these was a primary reason quanah parker resisted negotiations between texas and the federal government?
The primary reason Quanah Parker resisted negotiations between Texas and the Federal government was because he wanted to make his tribe which is Comanche self sufficient.
What is Negotiation?This is defined as a dialogue between two or more people or parties intended to reach a beneficial outcome.
Quanah Parker was the leader of the Comanche Nation and was involved in reservations that emphasized their cultural heritage but resisted negotiations as he wanted his tribe to be self sufficient.
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The duck billed platypus is one of the few egg-laying mammals remaining in the world. Like many unusual life forms, it is native to australia, a country that is an island. Australia has many life forms, a unique biodiversity, not seen elsewhere in the world because the country
Answer:
D) is separated from the rest of the world.
Explanation:
I did it on usatestprep and I got it right so.
Ike’s bikes is a major manufacturer of bicycles. Currently, the company produces bikes using only one factory. However, it is considering expanding production to two or even three factories. The following table shows the company’s short-run average total cost (sratc) each month for various levels of production if it uses one, two, or three factories. (note: q equals the total quantity of bikes produced by all factories. )
The short run average cost when Ike's bike is producing 600 bikes per month will be $720.
What is a short run average cost?It should be noted that the short run average cost simply means the average fixed cost plus the average variable cost.
From the complete question, the table given shows the average total cost. In this case, the quantity is 600 and the number of factory is 1. Therefore, the short run average total cost from the table is $720.
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Read the passage from "the lamb. " little lamb, who made thee? by regularly repeating this line in the poem, blake uses the line as a rhyme. Refrain. Theme. Topic
Answer:
A. Refrain
Explanation:
this is the answer on edge 2022
In the passage from "the lamb. " little lamb, the repeating line in the poem is called Refrain.
What does refrain mean?The term refrain is known to be any word or line that is often used many times within a lines or stanza.
Conclusively, Note that the term refrain is also a part of a song or poem that is said to be repeated by the author or writer such as the case above.
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How much heat does it take to raise 50.0 g of liquid water to 50 °c if its initial temperature is -50 °c?
The quantity of heat that is required to raise this sample of liquid water is 20,900 Joules.
Given the following data:
Mass of liquid water = 50.0 grams.Initial temperature = 50°CFinal temperature = -50°CScientific data:
Specific heat capacity of water = 4.18 J/g °C.Specific heat capacity of ice = 2.108 J/g °C.How to calculate the quantity of heat.Mathematically, quantity of heat is given by this formula:
[tex]Q = mc \theta[/tex]
Where:
m is the mass.c is the specific heat capacity.[tex]\theta[/tex] is the change in temperature.Substituting the given parameters into the formula, we have;
[tex]Q=50.0 \times 4.18 \times (-50-50)\\\\Q=209(-100)[/tex]
Quantity of heat = -20,900 Joules.
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Discuss two reasons why grade 12 learners should write their nbts as early as possible
Answer:
help to interpret your NSC results and can be used by universities in different ways. that is why i think.
Explanation:
This test enables the admission officers in the university to determine the suitability of students in a program to which they applied.
What is the NBTS?The is the acronymn that means The National Benchmark Tests. It is a test that prospective university students are required to take in order to certify their aptitude in the required domains neccessary for university education.
It is important for students in grade 12 to take this test to enable the admission officers in the university to determine their suitability in the program to which they applied.
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