Question: Graph A B is the correct figure because the alternative hypothesis should be one dash sided; two dash sided; the test is to see if

Graph A B is the correct figure because the alternative hypothesis should be one dash sided; two dash sided; the test is to see if the proportion has changed, for better or worse. improved.

Suppose researchers are testing people to see whether the rate of use of seat belts has changed from a previous value of 83%. Suppose that in their random sample of 500 people they see that 421 have the seat belt fastened. Which of the following figures has the correct p-value for testing the hypothesis that the proportion who use seat belts has changed? Explain your choice. (A) (B) ZL) a a 1-PropZTest 1-PropZTest 2=0.7143 p=0.2375 2=0.7143 p=0.475 2 p 2 p

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