# TRM-Section_7.1_Quizzes - Quiz 7.1A AP Statistics Name: 1....

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©BFW PublishersThe Practice of Statistics for AP*, 5/eQuiz 7.1AAP StatisticsName:1.For each description below, identify each underlined number as a parameter or statistic. Useappropriate notation to describe each number, e.g.,ˆ0.96p=(a)A 1993 survey conducted by theRichmond Times-Dispatchone week before election day askedvoters which candidate for the state’s attorney general they would vote for.37% of therespondents said they would vote for the Democratic candidate.On election day, 41% actuallyvoted for the Democratic candidate.(b) The National Center for Health Statistics reports that the mean systolic blood pressure formales 35 to 44 years of age is 128 and the standard deviation is 15.The medical director of alarge company looks at the medical records of 72 executives in this age group and finds that themean systolic blood pressure for these executives is 126.07.2.Suppose two different statistics—call them Statistic A and Statistic B—can be used to estimate thesame population parameter.Statistics A has lower bias than B, but A also has high variabilitycompared to B.On the two axes below, draw two parallel dotplots showing 8 values of eachstatistic that are consistent with these characteristics.Assume that the parameter value is at thearrow on the axes..Statistic AStatistic B
©BFW PublishersThe Practice of Statistics for AP*, 5/e3.A large pet store that specializes in tropical fish has several thousand guppies.The store claimsthat the guppies have a mean length of 5 cm and a standard deviation of 0.5 cm.You come to thestore and buy 10 randomly-selected guppies and find that the mean length of your 10 guppies is 4.8cm.This makes you suspect that the mean fish length is not what the store says it is.To explorethis further, you assume that the length of guppies is Normally distributed and use a computer tosimulate 200 samples of 10 guppies from the store’s claimed population.Below is a dotplot of themeans from these 200 samples.

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Term
Fall
Professor
Mr. Abraham
Tags
BFW Publishers, National Center for Health Statistics