It is best to use median as your measure of center when you have an extreme number in your set of data (also known as an outlier).

this isn't a question

true

Step-by-step explanation:

The median is generally a better measure of the center when there are extreme values or outliers because it is not affected by the precise numerical values of the outliers. The mean is the most common measure of the center. The words “mean” and “average” are often used interchangeably.

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1

a variable is any characteristics, number, or quantity that can be measured or counted. a variable may also be called a data item. hope i !