Welcome to Westonci.ca, where your questions are met with accurate answers from a community of experts and enthusiasts. Join our Q&A platform and connect with professionals ready to provide precise answers to your questions in various areas. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

Here are 10 test scores: 30, 74, 76, 77, 78, 79, 80, 80, 82, 84. The mean of these scores is 74.



Does this set have an outlier and, if so, how does removing it affect the mean?



A.
The set has 30 as an outlier and removing it decreases the mean by about 10.


B.


This data set has no outliers.


C.
The set has 30 as an outlier and removing it increases the mean by about 5.


D.
The set has 30 as an outlier and removing it decreases the mean by about 5.