A large oil company is studying the number of gallons of gasoline purchased per customer at self-service pumps. The mean number of gallons is 10.0 with a standard deviation of 3.0 gallons. The median is 10.75 gallons. What is the Pearson's coefficient of skewness?
A) -1.00
B) -0.75
C) +0.75
D) +1.00

Question

Quizplus · Accepted Answer

We can use the formula for Pearson's coefficient of skewness, which is:

(skewness) = 3 * (mean - median) / standard deviation

Plugging in the values given, we get:

(skewness) = 3 * (10.0 - 10.75) / 3.0 = -0.75

Therefore, the Pearson's coefficient of skewness is -0.75, which corresponds to choice B.

A Large Oil Company Is Studying the Number of Gallons