Question

From the following frequency distribution of heights of 360 boys in the age-group 10 – 20 years calculate the:

(i) arithmetic mean;

(ii) coefficient of variation; and

(iii) quartile deviation

Height (cms) No. of boys



126 – 130 31

131 – 135 44
136 – 140 48
141 – 145 51
146 – 150 60
151 – 155 55
156 – 160 43
161 – 165 28

Answer 1

Answer:

your solution is in above pics

pls mark it as brainliest