Question

(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​

Answer 1

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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