IQ scores are normally distributed with a mean of 105 and a standard deviation of 17. Assume that many samples of size n are taken from a large population of people and the mean IQ score is computed for each sample.

The standard deviation of the distribution of sample means is _______

use integer or decimal rounded to the nearest tenth asneeded.)

If the sample size is n=144, find the mean and standard deviation of the distribution of sample means.