Set A = {1, 2, 3, 4, 5, 6, y}
Which of the following possible values for y would cause Set A to have the smallest standard deviation?	Choose the correct option.
A) 1 B) 2.5 C) 3 D) 3.5 E) 7
S3.5 is minimum or least when the number is closest to the mean of the existing numbers   Calculating mean of the rest of the numbers gives mean = (approx)3.6   So the new number should be near to the mean and only number closest to the mean is 3.5   Answer: Option 3.5
<result>D</result>
Set A = {1, 2, 3, 4, 5, 6, y}
Which of the following possible values for y would cause Set A to have the smallest standard deviation?