The following sample of 16 measurements was selected from a population that is approximately normally distributed: 91
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The following sample of 16 measurements was selected from a population that is approximately normally distributed:
91 80 99 110 95 106 78 121 106 100 97 82 100 83 115 104
a. Construct an 80% confidence interval for the population mean.
b. Construct a 95% confidence interval for the population mean, and compare the width of this interval with that LO6 of part a.
c. Carefully interpret each of the confidence intervals, and explain why the 80% confidence interval is narrower.
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