# Question

Consider the following grouped sample data:

Values Frequency

5 to under 10 ..... 15

10 to under 15 ..... 9

15 to under 20 .... 21

20 to under 25 .... 24

25 to under 30 ..... 6

a. Calculate the approximate mean of these sample data.

b. Calculate the approximate standard deviation of these sample data.

Values Frequency

5 to under 10 ..... 15

10 to under 15 ..... 9

15 to under 20 .... 21

20 to under 25 .... 24

25 to under 30 ..... 6

a. Calculate the approximate mean of these sample data.

b. Calculate the approximate standard deviation of these sample data.

## Answer to relevant Questions

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