Question

Find average earnings and standard deviation of the group of 432 workers from the given data:
Monthly wages No.of workers
80-100 18
100-120 30
120-140 20
140-160 40
160-180 90
180-200 70
200-220 68
220-240 36
240-260 27
260-280 21
280-300 12
​

Answer 1

Answer:

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