Question 1

4pts

A school district wants to justify building a new elementary school in the district. Which statistical method would be most appropriate?

Group of answer choices

Regression with number of students as the independent variable

Regression number of students as the dependent variable

Use a confidence interval with expected number of students per school as the mean

A hypothesis test with an alternative hypothesis that the number of students per school is less than or equal to average capacity of the schools in the district

A hypothesis test with an alternative hypothesis that the number of students per school is more than the average capacity of the schools in the district

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Question 2

4pts

Which statistical process would be most helpful in determining critical variables in a track athlete's success in the decathlon as determined by points earned?

Group of answer choices

A hypothesis test with a null hypothesis that the number of points earned is less than the average points earned

Use a confidence interval with points earned in the decathlon as the mean

Regression with points earned in the decathlon as the independent variable

A hypothesis test with a null hypothesis that the number of points earned is greater than or equal to the average points earned

Regression with points earned in the decathlon as the dependent variable

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Question 3

4pts

When planning a big outdoor event, one might consider the most likely temperatures during the day of the event to determine activities.The planner might look at:

Group of answer choices

The average temperature of the previous year

The average temperature of the month of the event

The temperature of the current day

The temperature of the previous year on that day

The average temperature of their previous 10 planned events

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Question 4

4pts

A professor wants to check the distribution of scores on a recent test to see if the test was too hard, too easy, or had just the right difficulty.What type of graph would be the most effective presentation?

Group of answer choices

Scatter plot with test grades on the x-axis and time to complete the test on the y-axis

A confidence interval with last year's test scores as the mean

Histogram with test grades grouped into classes on the x-axis

Pie chart showing break down of letter grades

A Pareto chart sorting letter grades on the test from most frequently occurring to the least frequently occurring

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

A regression with the number of cavities as the independent variable

A regression with the number of cavities as the dependent variable

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Question 6

4pts

To compare the dispersion of days people vacation at the beach, mountains, and amusement parks, a researcher could compare:

Group of answer choices

A box and whisker plot for each location based on the number days

A histogram of the number of the number of vacationers at each location

A scatter plot of vacation days on the x axis and location on the y axis

A Pareto chart of the number of vacationers at each location

A pie chart with the number of vacation days for each location