Question

select the outlier in the data set. 731 957 13 852 939 736 580 818 781 717 929 657 915 684 720 770 755 766 718 715 if the outlier were removed from the data set, would the mean increase or decrease? increase decrease

Explanation:

Step1: Identify outlier

An outlier is a data - point that is significantly different from other data - points. In this set, most values are in the range of 500 - 900, but 13 is much smaller. So 13 is the outlier.

Step2: Analyze effect on mean

The mean is the sum of all data - points divided by the number of data - points. Since 13 is a very small value compared to the others, it pulls the mean down. Removing it will increase the mean.

Answer:

13
increase