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.

Answers

Answer 1

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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Related Questions

Is the process of providing knowledge and tools for people that enable them to protect their health.

Answers

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.

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).

Answers

I don't know anything to share

A 60 year old patient is enrolled in hospice and is undergoing dialysis

Answers

I have to agree with this I think this isn’t good

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?

Answers

Answer:

matched pairs

Explanation:

In the context of the passage, what is the connotation of beloved and love? they suggest friendship, suggesting that even base men need close bonds. They suggest weakness, since machiavelli argues the bonds of love are easily broken. They suggest faithfulness, since machiavelli’s love can be relied on in times of need. They suggest faithfulness, suggesting obligations that are secured through love

Answers

The connotation of beloved and love suggest weakness, since Machiavelli argues the bonds of love are easily broken.

What is  the term beloved?

The term beloved connote when a thing or someone is dear to you and you love them.

People often have love for others and some also for their path. The The connotation in the passage above about the term beloved and love shows that of weakness, because Machiavelli argues the bonds of love are easily broken.

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Answer:

answer is B

Explanation:

i took the test edge 2022

A collection of organisms that belong to different populations but all live in the same area and interact with one another

Answers

Ecosystem if I’m not mistaken

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

Answers

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.

Global warming is caused only by natural factors true or false

Answers

Answer:

False

Explanation:

We as humans pollute and toxicate the air and ozone layers with many harmful gases, like CO² and greenhouse gases.

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?

Answers

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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Who worked against truman’s efforts to desegregate the military? a. Philip randolph northern republicans franklin d. Roosevelt southern democrats

Answers

Answer:

Southern Democrats worked against Truman's efforts to desegregate the military.

It should be noted that Roosevelt southern democrats worked against Truman's efforts to desegregate the military.

According to this question, we are to discuss about how the Truman's efforts to desegregate the military was countered.

As a result of this we can see that their efforts was sabotaged by the Roosevelt southern democrats.

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Daniel is a senior at utep. Brian, daniel’s father, is concerned about daniel’s study habits, given that daniel spends most of his evenings drinking instead of the library. Brian promises daniel that he will send him on an expense-paid trip to europe after his graduation if daniel spends at least five evenings a week studying in the campus library for the remainder of his senior year. Daniel agrees and keeps his promise to study. After returning home from his graduation, daniel asks brian about the european trip. Brian replies, "your education was your reward. I don’t owe you a trip to europe. " brian is:

Answers

Brian is incorrect and He stills owes Daniel an European Trip.

To approach this case, we need to understand the concept of negative reinforcement.

What is Negative Reinforcement?

Negative reinforcement is a strategy that may be used to assist in the teaching of certain behaviour. In reaction to a stimulus, something disagreeable or unpleasant is forcibly removed with negative reinforcement.

This is done with the assumption that the unpleasant behavior will be removed, the good behavior will be restored with time.

That is exactly what happened in the Case of Brain(Daniel's Father) with Daniel. He uses a negative reinforcement ( by promising Daniel a trip to Europe), If he uses the time he engages in drinking for reading.

However, at the end, Brain is obligated to fulfil his promises for Daniel as Daniel keeps his promise to study.

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Aubrey invested $7,100 in an account paying an interest rate of 5. 6% compounded quarterly. Assuming no deposits or withdrawals are made, how much money, to the nearest ten dollars, would be in the account after 19 years?

Answers

Answer:

6.6%

Explanation:

after 19 years

An isosceles right triangle has leg lengths of 4 centimeters what is the length of the altitude

Answers

Answer:

First calculate the third length of the triangle using the Pythagorean theorem on a right isosceles triangle given by:

hyp=side√2=4√2

Then we know that since this is an isosceles triangle, the altitude is also a median.

We can then use the property of the median relative to the hypotenuse is equal half of it.

median/Altitude=hyp/2=4√2/2=2√2

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. )

Answers

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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Part a: how does the following phrase contribute to the development of the main arguments supporting warren's opinion: "our decision, therefore, cannot turn on merely a comparison of these tangible factors in the negro and white schools involved in each of the cases" (paragraph 16)?

Answers

The following phrase given contributes to the development of the main arguments supporting warren's opinion by proving that the question of whether or not segregated schools are truly equal is irrelevant due to progress made by African Americans.

What is the United State Court Decision in Kansas Board Education?

The basis of this case shows that the Negro race through legal representatives seeks the court in getting admission to public schools of their interest on a nonsegregated basis. However, of which they are being denied admission to schools where the while folks enrolled in.

This led to the warren's opinion, however, the phrase contributes to the development of the main argument by proving that the question of whether or not segregated schools are truly equal is irrelevant due to progress made by African Americans.

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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

Answers

Answer:

D) is separated from the rest of the world.

Explanation:

I did it on usatestprep and I got it right so.

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

Answers

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:

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

Answers

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

Based on the information on the map what can you infer

Answers

Answer:

California

Explanation:

it's the best place in the world

Three contemporary events transforming south africa

Answers

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.

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

Answers

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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If you can't swim you are not allowed in the deep end

Answers

True true true true true true eur the

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

in a distribution where the mean is to the right of the median, the histogram of the distribution will probably

Answers

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.

Which of these was a primary reason quanah parker resisted negotiations between texas and the federal government?

Answers

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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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?

Answers

The demand (to the nearest unit) in 2012 when the price is rs. 25 per unit is 320 units

Inverse variation

Let 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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How much heat does it take to raise 50.0 g of liquid water to 50 °c if its initial temperature is -50 °c?

Answers

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°C

Scientific 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

Answers

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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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

Answers

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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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

Answers

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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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?

Answers

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:

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