The weights in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. mean = 160 range = 60
Mode = 165 variance = 324
Median = 170
The coefficient of variation equals
A) 0.1125%
B) 11.25%
C) 203.12%
D) 0.20312%

Question

Quizplus · Accepted Answer

The coefficient of variation (CV) is calculated as the ratio of the standard deviation to the mean, expressed as a percentage. 
CV = (standard deviation/mean) x 100%
We are not given the standard deviation, but we can calculate it using the variance:
standard deviation = square root(variance) = square root(324) = 18
Therefore, 
CV = (18/160) x 100% = 11.25% 
So, the answer is B.

The Weights in Pounds) of a Sample of 36 Individuals