Exam 4 Review

Exam 4 Review - Stat 145 Exam 4 Review Questions Note This...

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Stat 145: Exam 4 Review Questions Note: This is not intended to be a preview of the actual exam. Rather, it is meant to give you an idea of the types of questions that will be asked. There are concepts in these review problems that will not appear on the actual exam, just as there will be concepts on the actual exam that are not covered in these review problems. 1. People who were born between 1978 and 1983 are sometimes classiﬁed by demogra- phers as belonging to Generation Y. According to a recent survey, 459 of 850 randomly sampled Generation Y web users reported using the Internet to download music. (a) What is the sample proportion ˆ p of Generation Y web users who use the Internet to download music? (b) Give a 95% conﬁdence interval for p , the proportion of Generation Y web users who use the Internet to download music. (c) How many Generation Y web users should be sampled in order to estimate p within ± 0 . 03 with 95% conﬁdence? (Note: Use the value of ˆ p from the recent survey for the guessed value

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This homework help was uploaded on 04/02/2008 for the course STAT 145 taught by Professor Allstats145 during the Summer '07 term at New Mexico.

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Exam 4 Review - Stat 145 Exam 4 Review Questions Note This...

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