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2011 the carnegie foundation for the advancement

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Unformatted text preview: THE CARNEGIE FOUNDATION FOR THE ADVANCEMENT OF TEACHING A PATHWAY THROUGH STATISTICS, VERSION 1.6, STATWAY™  ­ STUDENT HANDOUT STATWAY™ STUDENT HANDOUT | 7 Lesson 10.2.2 Confidence Intervals for a Population Mean TAKE IT HOME 1 At Abraham Lincoln High School an achievement test is used for college placement. Counselors selected a simple random sample of 15 students from the school and scored their tests by hand before sending them in for computer processing. For this sample, ! = 525 and ! = 24. Assuming that the test scores are normally distributed, construct a 99% confidence interval for µ, the population mean score for Abraham Lincoln High School. A Are the criteria for approximate normality satisfied? Explain. B Determine the sample mean, sample standard deviation, and sample size. C Determine the critical value that corresponds to the 99% level of confidence. D Compute the margin of error, E. E Give the 99% confidence interval. F Interpret your confidence interval in context. ©...
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