A population has a mean of $=50$ and a standard deviation of $=10.$ If $3$ points were added to every score in the population, what would be the new values for the mean and standard deviation? $=13=150=10=53$ A population has a mean of $=50$ and a standard deviation of $=10.$ If $3$ points were added to every score in the population, what would be the new values for the mean and standard deviation? $=13=150=10=53$