Applying the Concepts and Skills
Preliminary data analyses indicate that you can reasonably consider the assumptions for using pooled t-procedures satisfied in Exercises10.45–10.50. For each exercise, perform the required hypothesis test by using either the critical-value approach or the P-value approach.
10.45 Doing Time. The Federal Bureau of Prisons publishes data in Prison Statistics on the times served by prisoners released from federal institutions for the first time. Independent random samples of released prisoners in the fraud and firearms offense categories yielded the following information on time served, in months.
At the 5% significance level, do the data provide sufficient evidence to conclude that the
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INTRO.STATISTICS,TECH.UPDT.-W/MYSTATLAB
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