QUESTION 3
Which of the following increases the range of a confidence interval (select all that apply)?
Decreasing the confidence level |
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Decreasing the standard deviation |
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Increasing the sample size |
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Increasing the standard deviation |
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Decreasing the same size |
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Increasing the confidence level |
12 points
QUESTION 4
As I've mentioned, sample size is so important because it's the only way we learn about the population. But in one of the techniques we've discussed, sample size is particularly important. Which one is it?
Confidence interval when the population standard deviation is unknown |
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Determining the sample size of a proportion |
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Confidence interval of a proportion |
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Confidence interval when the population standard deviation is known |
12 points
QUESTION 5
Which of the following is an example of a Type I error? (Select all that apply.)
Going on a date with a rude and terrible person. |
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Buying a book that turned out to be terrible. |
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Ignoring a job opportunity that you not only could have got but would have been a great fit for you. |
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Not eating at a restaurant that you would have loved. |
20 points
QUESTION 6
Which of the following is an example of a null hypothesis?
Spending more on advertising will have some kind of effect on a company's profits (the profits will increase or decrease). |
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The health benefits of running a mile a day are the same as the health benefits of walking a mile a day. |
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A hybrid car has better gas mileage than a regular car of equal size. |
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Drinking four glasses of water every day will help you fall asleep at night. |
12 points
QUESTION 7
Which of the following requires a two-tailed test? (Select all that apply.)
Testing if sales in a new location are unusual from what you know to be standard. |
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Determining if a machine filling M&M bags is functioning properly. |
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Inquiring if a more expensive internet connection is any faster than what you're currently using. |
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Testing if Title IX (a law requiring equal treatment for women in education) enriched the opportunties available for women. |
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Inquiring if a poll of Americans concerning marijuana legalization over- or under-estimates their opinion of the measure. |
3) Increasing the standard deviation
Decreasing the sample size
Increasing the confidence level
4) Confidence interval when the population standard deviation is unknown.
5) Ignoring a job opportunity that you not only could have got but would have been a great fit for you.
Not eating at a restaurant that you would have loved.
6) The health benefits of running a mile a day are the same as the health benefits of walking a mile a day.
7) Testing if sales in a new location are unusual from what you know to be standard
Determining if a machine filling M & M bags is functioning properly.
Inquiring if a poll of Americans concerning marijuana legalization over-or-under-estimates their opinion of the measure.
Determining if a
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