You may want to read about statistics, measures of central tendency, and measures of spread before doing this worksheet.

- Calculate the standard deviation of a population with given size and
sum of squared deviations.
a. 15, 364.15 b. 34, 1040 c. 5, 81.4 d. 100, 1842.138 e. 18, 24 f. 81, 243 - Two dice are rolled fifteen times, and their sums are as follows: 5, 8, 7, 11, 4, 9, 9, 7, 6, 3, 8, 2, 6, 10, 7 Find the mean and standard deviation of this sample.
- A committee is assessing the usefulness of two programs to aid in teaching reading to elementary school students. Both programs have been evaluated on usefulness and practicality by a large number of elementary school teachers. The means of the ratings of the two programs are approximately equal. What other statistics might help the committee make their decision? Why?