Andrijana3306
asked
in Quantitative Aptitude
Mar 20, 2018
recategorized
Mar 3, 2021
by Lakshman Patel RJIT

1 vote

Which of the following assertions are $\textbf{CORRECT}$?

- Adding $7$ to each entry in a list adds $7$ to the mean of the list.
- Adding $7$ to each entry in a list adds $7$ to the standard deviation of the list.
- Doubling each entry in a list doubles the mean of the list.
- Doubling each entry in a list leaves the standard deviation of the list unchanged.

- $P,Q$
- $Q,R$
- $P,R$
- $R,S$