A random sample of 53 observations was taken. The average in the sample was 90 with a variance of 400.
a.Construct a 98% confidence interval for .
b.Construct a 99% confidence interval for .
c.Discuss why the 98% and 99% confidence intervals are different.
d.What would you expect to happen to the confidence interval in Part a if the sample size was increased? Be sure to explain your answer.
Correct Answer:
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b.82.65 to 97...
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