(1) The cost of living index and the number of weeks are given in the following table.
Find the mean cost of living index using assumed mean method :
Cost of living 140 - 150 - 160 - 170- 180 -
190
index
150 160 170 180 190 200
Number of weeks 5 10 I 18
9
Answers
Mean cost of living index = 166.35
Step-by-step explanation:
Cost of living Mean Weeks Mean * weeks
140 - 150 145 5 725
150 - 160 155 10 1550
160 - 170 165 20 3300
170 - 180 175 9 1575
180 - 190 185 6 1110
190 - 200 195 2 390
Total 52 8650
Mean index = 8650/52 = 166.35
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