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Quiz 9.1B

# Quiz 9.1B - The medical director of a large company looks...

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Quiz 9.1B AP Statistics Name: In items 1–3, classify each underlined number as a parameter or statistic. Give the appropriate notation for each. 1. Forty-two percent of today’s 15-year-old girls will get pregnant in their teens. 2. A 1993 survey conducted by the Richmond Times-Dispatch one week before Election Day asked voters which candidate for the state’s Attorney General they would vote for. Thirty-seven percent of the respondents said they would vote for the Democratic candidate. On Election Day, 41% actually voted for the Democratic candidate. 3. The National Center for Health Statistics reports that the mean systolic blood pressure for males 35 to 44 years of age is 128 and the standard deviation is 15
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Unformatted text preview: . The medical director of a large company looks at the medical records of 72 executives in this age group and finds that the mean systolic blood pressure for these executives is 126.07 . Below are histograms of the values taken by three sample statistics in several hundred samples from the same population. The true value of the population parameter is marked on each histogram. 4. Which statistic has the largest bias among these three? Justify your answer. 5. Which statistic has the lowest variability among these three? 6. Based on the performance of the three statistics in many samples, which is preferred as an estimate of the parameter? Why? Chapter 9...
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