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1. Determine the margin of error for a confidence interval estimate for the population mean of a normal distribution given the following information:
a. confidence level = 0.98, n = 13, s = 15.68
b. confidence level = 0.99, n = 25, s = 3.47
c. confidence level = 0.98, standard error = 2.356
2. The following sample data have been collected based on a simple random sample from a normally distributed population:
2
8
0
3
5
1
4
a. Compute a 90% confidence interval estimate for the population mean.
b. Show what the impact would be if the confidence level is increased to 95%. Discuss why this occurs.
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