# GATE2012-65

Which of the following assertions are CORRECT?

P: Adding 7 to each  entry in a list adds 7 to the mean of the list

Q: Adding  7 to each entry in a list adds 7 to the standard deviation of the list

R: Doubling each entry in a list doubles the mean of the list

S: Doubling each entry in a list leaves the standard deviation of the list unchanged

1. P, Q
2. Q, R
3. P, R
4. R, S
in Others
edited