Assume the data are in thousands of dollars. 173.1 171.2 141.9 112.6 211.1 156.5 145.4 134.0 192.0 185.8 168.3

131.0

214.4

155.2

164.9

123.9

161.9

162.7

178.8

161.3

182.0

165.8

213.1

177.4

159.3

The data are to be organized into a frequency distribution.

a) How many classes would you recommend? 2

b) If you were advised to use 11 classes, what class interval would you suggest? 2

c) Organize the scores into a frequency distribution using 11 classes and extend it to a cumulative frequency distribution. 8

d) Determine the proportion of the scores that are at least $175,000 4

e) Determine the proportion of the scores that are at less than $205,000 and at least

$135,000. 4

data