Peak Efficiency Levels (In %) for the Wind Turbines at Miner's

Multiple Choice

Peak efficiency levels (in %) for the wind turbines at Miner's Point are shown for a sample of 10 days in April.According to the ""three-standard-deviation" approach to identifying outliers, determine the outlier(s) , if any, here.

A) 69 and 80.5
B) 69
C) 74.9 and 80.5
D) 80.5
E) There are no outliers