Q 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
(A) P,Q
(B) Q,R
(C) P,R
(D) R,S
Answer: (C)
Explanation:
