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It has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. It has been thought that changing the speed limit from 65mph to 70mph would not increase the "typical" speed of 70 - 75mph. On one stretch of a highway the speed limit was increase from 65mph to 70mph. If the population mean speed on this stretch of the highway has been 68mph with a standard deviation of 5mph, what is the sample size needed to detect an increase in speed on this stretch of the highway of 10mph? Let alpha = 0.02 and beta = 0.05
Write the null and alternative hypotheses:
Calculate the sample size:
in a study undertaken by catalyst 43 of women senior executives agreed or strongly agreed that a lack of role models
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Taking α to be 0.05, what is/are the critical values associated with testing your hypothesis?
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A political action committee decided to poll its membership to determine if they were in favor of a certain potential law, similar to gun control.
You are a research analyst with a large research and development firm, Akron Research. Your firm performs studies and analysis for companies that need product, process improvement, manufacturing, and consulting research services.
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