Question 1

4pts

If neighbors wanted to have a speed bump installed on one part of the road, which statistical method would be most effective.

Group of answer choices

Regression with speed as the dependent variable

Regression with speed as an independent variable

Hypothesis testing with a null hypothesis that the speed is less than or equal to the posted speed

Use a confidence interval with the posted speed as the mean

Hypothesis testing with a null hypothesis that the speed is more than the posted speed

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Question 2

4pts

If a franchise company wanted to determine why sales were higher at some locations rather than others, what statistical process would be most appropriate?

Group of answer choices

Regression with sales as an independent variable

Use a confidence interval with the posted speed as the mean

Hypothesis testing with a null hypothesis that the sales are more than the highest sales

Regression with sales as the dependent variable

Hypothesis testing with a null hypothesis that the sales are less than or equal to the highest sales

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Question 3

4pts

A coffee shop fills its 10 fluid ounce cups, but tries to come up a bit short so that customers don't spill hot coffee on themselves.The cups are sold as having 9.5 fluid ounces.What statistical strategy would allow them to see if this method is being implemented correctly?

Group of answer choices

A hypothesis test with an alternative hypothesis that is more than 9.5 fluid ounces

A confidence interval with 10 fluid ounces as the mean

A hypothesis test with an alternative hypothesis that is less than 10 fluid ounces

A hypothesis test with an alternative hypothesis that is less than 9.5 fluid ounces

A hypothesis test with an alternative hypothesis that is more than 10 fluid ounces

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Question 4

4pts

A systems analyst considers 18 different reasons why a computer might run slow.To identify the most common of those reasons, which graph might the analyst consider?

Group of answer choices

A pie chart based on reasons previous computers stopped working

A Pareto chart based on reasons previous computers stopped working

A confidence interval around the speed of the computer

A scatter plot based on reasons on the x axis and the time to run diagnostics on the y axis

A Pareto chart based on reasons previous computers ran slowly

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Question 5

4pts

A dentist needs to ensure that she has enough supplies on hand to fill all the cavities of her patients for the next week.She finds that the number of cavities is normally distributed.What calculation could she run to determine if a patient has an unusual number of cavities?

Group of answer choices

A regression with the number of cavities as the independent variable

A regression with the number of cavities as the dependent variable

A hypothesis test with a null hypothesis that the number of cavities is greater than or equal to the expected number

A confidence interval with the expected number of cavities as the mean

A hypothesis test with a null hypothesis that the number of cavities is less than or equal to the expected number

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Question 6

4pts

A company wants to consider the age groups of customers that shop before noon.Which of the following graphs would be most helpful to make that determination?

Group of answer choices

A histogram of the ages of all shoppers

A histogram of the ages of shoppers before noon

A scatter plot of shoppers on the x axis and times on the y axis

A pie chart of the ages of shoppers before noon

A Pareto chart with times of shoppers throughout day