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

Which of the following assertions are CORRECT? P : Adding 7 to each en

1.	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» D. R, S

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