For the data in Problem 3.11, construct a 95% confidence interval for the ratio of the two variances for sets 1 and 2. Are the variances equal statistically at this level of confidence? Justify your response statistically.

Problem 3.11

Discuss the normality of each set of data below and whether any observations may be removed at the 99% level of certainty as blunders or outliers. Determine which set is more precise after apparent blunders and outliers are removed. Plot the relative frequency histogram to defend your decisions.

Set 1: 468.09 468.13 468.11 468.13 468.10 468.13 468.12 468.09 468.14 468.10 468.10 468.12 468.14 468.16 468.12 468.10 468.10 468.11 468.13 468.12 468.18

Set 2: 750.82 750.86 750.83 750.88 750.88 750.86 750.86 750.85 750.86 750.86 750.88 750.84 750.84 750.88 750.86 750.87 750.86 750.83 750.90 750.84 750.86