(Solved): A population of values has a normal distribution with =49.8 and =68.3. A random sample of size ...

A population of values has a normal distribution with $?=49.8$ and $?=68.3$. A random sample of size $n=149$ is drawn. a. What is the mean of the distribution of sample means? ${?}_x=$ b. What is the standard deviation of the distribution of sample means? Round your answer to two decimal places. ${?}_z=$