The mean and standard deviation of a random sample of n measurements are equal to 33.5 and
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The mean and standard deviation of a random sample of n measurements are equal to 33.5 and 3.5, respectively. LO6
a. Find a 90% confidence interval for m if n = 144.
b. Find a 90% confidence interval for m if n = 576.
c. Find the widths of the confidence intervals found in parts a and
b. What is the effect on the width of a confidence interval of quadrupling the sample size while holding the confidence coefficient fixed?
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