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Unformatted text preview: Statistics 400  Lecture 12 Today: Finish 8.4; begin Chapter 9 MidTerm Next Thursday Review Next Tuesday Small Sample Confidence Interval for the Population Mean If x 1 , x 2 , , x n is a random sample from a normal population with mean , and standard deviation , then a confidence interval for the population mean is: If you have use a distribution instead! )% 1 ( 100  n S t X 2 / Example: Heights of males are believed to be normally distributed Random sample of 25 adult males is taken and the sample mean &amp; standard deviation are 69.72 and 4.15 inches respectively Find a 95% confidence interval for the mean Small Sample Hypothesis Test for the Population Mean Have a random sample of size n ; x 1 , x 2 , , x n Test Statistic: : = H n S X t /  = Small Sample Hypothesis Test for the Population Mean (cont.) Pvalue depends on the alternative hypothesis: Where T represents the tdistribution with ( n1 ) degrees of freedom ) ( value p...
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This note was uploaded on 02/06/2012 for the course STAT 400 taught by Professor Derekbingham during the Fall '01 term at University of MichiganDearborn.
 Fall '01
 DerekBingham
 Statistics

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