Briefly explain the meaning of the degrees of freedom for a t distribution. Give one example.
Answer to relevant QuestionsWhat assumptions must hold true to use the t distribution to make a confidence interval for µ? For each of the following, find the area in the appropriate tail of the t distribution. a. t = –1.302 and df = 42 b. t = 2.797 and n = 25 c. t = 1.397 and n = 9 d. t = –2.383 and df = 67 Briefly explain how the width of a confidence interval decreases with an increase in the sample size. Give an example. Jack’s Auto Insurance Company customers sometimes have to wait a long time to speak to a customer service representative when they call regarding disputed claims. A random sample of 25 such calls yielded a mean waiting ...The following data give the number of pitches thrown by both teams in each of a random sample of 24 Major League Baseball games played between the beginning of the 2012 season and May 16, 2012. a. Create a histogram of these ...
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