Answer
Range = Highest Value - Lowest Value = 38-3=35
Variance =$ σ^2=(∑〖(x-μ)〗^2 )/N $
$=[∑(x^2) -∑(x)^2]/N$
$=[9215-7031.25]/20$
$=109.1875$
Standard Deviation = $\sqrt 109.1875 = 10.4493$
b. Coefficient of Variation = $10.4493\div18.75 \times100% = 55.73%$
c. Population parameters, because the data were collected from all 20 employees of a small company.
Work Step by Step
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