Question

Given the following results relating to two groups containing 20 and 30 observations, calculate the coefficient of variation of all the 50 observations by combining both the groups : Groups I 45 118 II 35 132 Σ x?

Answer 1

Answer

Answer

The answer is 54

step by step explanation

$\frac{x}{30} = 50 \\ \\ x = 1500 \\ \\ \frac{y}{20} = 60 \\ \\ y = 1200 \\ \\ \frac{x + y}{50} = \frac{2700}{50} \\ \\ = 54 \: answer \:$