a. In a random sample of five people, the mean driving distanceto work was 24.2 miles and the standard deviation was 7.3 miles.Assume the population is normally distributed and use thet-distribution to find the margin of error and construct a 90%confidence interval for the population mean μ. Interpret theresults.
b. In a sample of 12 randomly selected highschool seniors, the mean score on a standardized testwas 1177 and the standard deviationwas 165.2. Further research suggests that the populationmean score on this test for high school seniorsis 1014. Does the t-value for the original samplefall between −t0.90 and t0.90? Assume that thepopulation of test scores for high school seniors is normallydistributed.
a. In a random sample of five people, the mean driving distance to work was 24.2 miles and the standard deviation was 7
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