T102 Supplement Chapter 8 – Statistics

1. Construct a circle graph to represent the following grade distribution on at test

10 A’s, 18 B’s, 40 C’s, 15 D’s, and 7 F’s.

2. Find the mean, median, and mode for each of the following:

a) 1, 3, 4, 6, 8, 9, 13, 13, 13, 14, 16, 18, 18, 19, 20, 21

b) 3, 7, 11, 4, 8, 18, 41, 36, 21, 14, 2, 7, 16, 7, 26

3. Find the standard deviation for the following set of scores:

3, 4, 6, 8, 10, 11, 14

4. Find the mean, median, mode, variance, and standard deviation for the

frequency distribution:

Score Frequency

5 3

10 5

15 7

20 4

30 1

Solutions

1. 40^◦ A’s, 72^◦ B’s, 160^◦ C’s, 60^◦ D’s, 28^◦ F’s

2.		Mean	Median	Mode
	a)	12.2	13	13
	b)	14.7	11	7

3. 3.7

4. Mean 14 Median 15 Mode 15 Variance 36.5 Std. dev. 6.04