Question

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 Pearson's coefficient of skewness in this instance?-1.00-0.75+0.75+1.00

Answer 1

Answer:

Sk= -0.75

Explanation:

The skewness measures the shape of the set data, specifically compares it with a normal distribution. If the coefficient high, the set data distribution differs from a normal distribution

The Person´s skewness coefficient formula is:

Sk= 3*(Mean-Median)/(standard deviation)

For this problem:

Sk= 3*(10-10.75)/3

Sk= 3*(-0.75)/3

Sk= -0.75

In this case, the distribution is negative skewed.