Question

39 Why should you screen and discard outliers and extreme values? * (5 Points) O All of the above Because it affects the mean estimation in O It distorts the average score It tends to stretch the mean estimate upward or downward 40 Which analysis must be used for prediction? (5 Points (1) ENG 130

Answer 1

As outliers or extreme value  increase the variability in your data, which decrease statistical power. Consequently excluding outliers can cause your results to become statistically significant. It means that your inference about population is better in comparison to include outliers or extreme value.