# HW10 - S tat 4714 Fall 2010 HW 10 Chapter 8 10 15.2 Topics...

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Stat 4714 Fall 2010 HW 10 Due Thursday November 4 th at 3pm (end of office hours) For problems where you are completing hypothesis tests, you must clearly list the hypotheses, test statistic, rejection region or p-value, decision, and conclusion. 1) We are going to use the threshold voltage data in file hw7_volt.jmp for this problem. a) Obtain the sample mean and sample variance for all the voltage observations (ignoring the variables site and wafer). b) Construct a 95% confidence interval for the variance. c) Conduct a hypothesis test to determine if the population variance is less than .001 volts. d) Conduct a hypothesis test to determine if the population mean is different than .60 volts. (You can obtain test statistic and p-value for this by hand or with JMP.) e) What sample size would we need to conduct the test in (d) at a significance level of .05 and with power = .98? (2) An article in the

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## This note was uploaded on 01/17/2011 for the course STAT 4714 at Virginia Tech.

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HW10 - S tat 4714 Fall 2010 HW 10 Chapter 8 10 15.2 Topics...

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