The distribution of blood cholesterol level in the population of young men aged 20 to 34 years is close to Normal with mean u=168 mg/dl and standard deviation = to 35 mg/dl. You measure the cholesterol level of 150 young men chosen at random and calculae the sampling mean.

A. If you did this many times, what would be the mean and the standard deviation of the distribution of the sampling means.

B. What is the probability that your sample has mean less than 165.

Thanks