Answer:
a. 11.25%.
Step-by-step explanation:
Coefficient of variation: This is the ratio of the standard deviation to the mean expressed in percentage. It is useful in statistic for comparing the degree of variation between two data set.
it can be expressed mathematically as,
Coefficient of variation = (σ/μ) × 100 Where σ= Standard deviation, and μ = mean
But: Standard deviation(σ) = √variance
And Variance = 324 ∴ σ = √324 = 18.
Mean (μ) = 160.
∴ Coefficient of variation = (18/160) × 100
Coefficient of variation = 11.25%
