SKILL BUILDER 7: THE 95% RULE In Exercises 2.118 to 2.121, use the 95% rule and the fact that the summary statistics come from a dis- tribution that is symmetric and bell-shaped to find an interval that is expected to contain about 95% of the data values. 2.118 A bell-shaped distribution with mean 200 and standard deviation 25. 2.119 A bell-shaped distribution with mean 10 and standard deviation 3. 2.120 A bell-shaped distribution with mean 1000 and standard deviation 10. 2.121 A bell-shaped distribution with mean 1500 and standard deviation 300. 2.122 Estimating Summary Statistics For the data- set

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