mc warm ups chapter 9.docx

# In testing hypotheses if the consequences of

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5. In testing hypotheses, if the consequences of incorrectly rejecting the null hypothesis are very serious, we should A) use a very large level of significance. B) use a very small level of significance. C) insist that the P -value be smaller than the level of significance . D) insist that the level of significance be smaller than the P -value.

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E) consult with an expert in the field you're studying for an interpretation of the P -value index. 6. The power of a statistical test of hypotheses is AP STATISTICS: Warm Up #3 Chapter 9 1. Which of the following will increase the power of a statistical test of significance. Use the following for questions 2-3 A December 2007 Gallup Poll reported that 43% of Americans use the internet for an hour or more each day. You suspect that a higher proportion of students at your school use the internet that much. To find out, you take a simple random sample of 60 students and find that 35 of them use the internet for an hour or more each day. (Assume your school has enough students so that this is a small sample relative to the size of the population). You will test the hypotheses 0 : 0.43; : 0.43 a H p H p , where p = the proportion of students at your school who use the internet for an hour or more each day, at the α = 0.01 level. 2. Which of the following best describes the sampling distribution of proportions for this test?
• Fall '19
• Statistics, Null hypothesis, Statistical hypothesis testing, Nissans

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