Using the frequency distribution in Exercise 3.53, determine the approximate mean and standard deviation for the underlying data.
A computer and statistical software will be desirable and useful. However, any necessary calculations can also be done with the aid of a pocket calculator. For readers using statistical software, keep in mind the file-naming key€” for example, the data for Exercise 3.57 will be in data file XR03057.
In exercise

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2.20 195 2.15 2.08 85 92 2.23 2.19 98 2.07 2.24 2.31 196 2.30 2.27 .89