Given a sample of three items (X = 4, 6, 5), which statement is incorrect?
A)The geometric mean is 5.2.
B)The standard deviation is 1.
C)The coefficient of variation is 20 percent.
D)The quartiles are useless.

Question

Quizplus · Accepted Answer

The geometric mean of the sample (X = 4, 6, 5) is calculated as the nth root of the product of the numbers, which is not 5.2. The correct geometric mean is the cube root of (4*6*5) = cube root of 120, which is approximately 4.93, not 5.2.

Given a Sample of Three Items (X = 4, 6