Excel users should note that there may be rows with empty cells (representing missing data) that must be removed. Random samples from two normal populations produced the following statistics:
s21 = 28 n1 = 10 s22 = 19 n2 = 10
a. Estimate with 95% confidence the ratio of the two population variances.
b. Repeat part (a) changing the sample sizes to n1 = 25 and n2 = 25.
c. Describe what happens to the width of the confidence interval estimate when the sample sizes increase.
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