Unformatted text preview: women? > z=(3.63.8)/sqrt(0.18/12+0.14/9) > z [1] 1.144155 Example 2. A study was conducted to compare the reaction times of men and women to a stimulus. 50 men and 65 women were employed in the experiment. Let X i be the reaction time of the ith man and Y j be the reaction time of the jth woman. The following measurements were taken: ¯ x = 3 . 6 seconds, ¯ y = 3 . 8 seconds, s 2 X = 0 . 18, s 2 Y = 0 . 14. Is there any diFerence between the reaction times of men and women? > z=(3.63.8)/sqrt(0.18/50+0.14/65) > z [1] 2.63664 > qnorm(0.025) [1] 1.959964 What is the main reason you are getting the diFerent results in Example 1 and 2? Selfstudy problems Determine the Pvalue in Example 1 and 2....
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 Fall '04
 Chung
 Statistics, Following, Test method

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