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Unformatted text preview: Statistics 400  Lecture 15 Today: 10.110.3 Assign #5: 8.62, 8.70, 8.78, and In recent years, there has been growing concern about the health effects of video display terminals (VDTs). It is known that the miscarriage rate of a pregnancy under normal conditions is about 20%. In a survey of 15 parttime female employees who used VDTs at least 20 hours per week, there were 5 reported miscarriages. At the 1% significance level, is there evidence that exposure to VDTs is increasing the miscarriage rate? Due next Thursday Example: An insurance company want to know if the average speed at which men drive is greater than that of women drivers The company took a random sample of 22 cars driven by men on a highway and recorded the average speed of each driver The company took another random sample of 14 cars driven by women on the same highway and recorded the average speed of each driver How might you go about testing the hypothesis? Inferences about Two Population Means...
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 Fall '01
 DerekBingham
 Statistics

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