1) You wonder whether men or women are morelikely to be driving when both a man and a woman are in the frontseat of a car. You observe 20 cars with both a man and a woman inthe front seat and count how many times the man is driving. Of the20 cars you observed, the man was driving in 15 of them.
What is the probability value for this result? (Give your answerto at least 3 places past the decimal point)
Selected Answer: 2.24
Response Feedback: Incorrect, Review Chapter 11, the Logic ofHypothesis Testing Note that you will need to use Excel or thebinomial calculator for this problemhttp://onlinestatbook.com/2/java/binomialProb.html Note that thisis a 2-tailed test because you asked whether men or women were morelikely to be driving. Make sure you include both tails.
1a) A professor believes there is a correlationbetween the amount of hours people are exposed to sunlight andtheir vitamin D level. He collects a random sample of people andmeasures their sun exposure and vitamin D levels. The correlationbetween the two in his sample is .65. The p-value is 0.002. What isthe appropriate conclusion? |
| SelectedAnswer: | There is a relationship between sun exposure and Vitamin D inthe population. People who get more sun have lower Vitamin Dlevels. | | AnswerFeedback: | Note the direction of the sample correlation. |
| ResponseFeedback: | Incorrect, Review Chapter 11, the Logic of HypothesisTesting |
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