Question

Miss Claire recorded the scores her students obtained in the last math quiz as follows:
65, 62, 67, 71, 71, 73, 95

What is the mean score without the outlier?

• A. 62.1
• B. 68.16
• C. 73.15
• D. 60

Answer 1

The correct option is B 68.16

An outlier is a value in a data set that is either too small or too big compared to the other values of the same data set.

Since most of the data points in the given data set lie between 65 and 73, the outlier is 95.

Mean = $\frac{Sumofalldatapoints}{Numberofdatapoints}$

Thus, mean without the outlier = $\frac{65+62+67+71+71+73}{6}$ = 68.16