A class has 80 students and the mean height is 5 feet 11 inc

A class has 80 students, and the mean height is 5 feet 11 inches. A random sample of 4 students is selected from class and their average height is calculated. Will the average height of students in the sample equal 5 feet 11 inches?

Solution

It may be equal to 5 feet 11 inches or may be not.

because there is sampling fluctuations. due to that the average height of all the samples are not equal as the sample values are random as we are taking a random sample. so it would not be 5 feet 11 inches.