Question

Which of the following assertions are correct?
(A) Adding 7 to each entry in a list adds 7 to the mean of the list.
(B) Adding 7 to each entry in a list adds 7 to the standard deviation of the list.
(C) Doubling each entry in a list doubles the mean of the list.
(D) Doubling each entry in a list leaves the standard deviation of the list unchanged.
Choose the most appropriate answer from the options given below :

• A. (A) and (B) only
• B. (B) and (C) only
• C. (A) and (C) only
• D. (C) and (D) only

Answer 1

Answer: (C)

(A) and (C) only

Answer 2

The correct answer is(C): (A) and (C) only