# AP Statistics Quiz 9.1AB-1.pdf - Quiz 9.1A AP Statistics...

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© 2011 BFW PublishersThe Practice of Statistics, 4/e- Chapter 9413Quiz 9.1AAP StatisticsName:1.For each of the following settings, define the parameter of interest and write the appropriatenull and alternative hypotheses for the test that is described.(a) The mean weight of loaves of bread produced at the bakery where you work is supposedto be one pound. You are the supervisor of quality control at the bakery, and you areconcerned that new personnel are producing loaves that have a mean weight of more thanone pound.(b) According to the Humane Society, 33% of households in the United States own at leastone cat.You are interested in determining whether the proportion of households of thestudents at your school that own at least one cat is different from the national proportion.2.Consider the bakery problem in question 1(a).Suppose you weigh an SRS of bread loavesand find that the mean weight is 1.025 pounds, which yields aP-value of 0.086.(a) Interpret theP-value in the context of the problem.(b) What conclusion would you draw at the °D = 0.05 level?At the°D = 0.10 level?
414The Practice of Statistics, 4/e- Chapter 9© 2011 BFW Publishers

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Null hypothesis, Type I and type II errors, Practice of Statistics, BFW Publishers