15. For a random sample of n = 64, find the probability of a sample mean being less than 24.3 when p = 24 and o = 1.25.

0.9726

Explanation:

The computation of the probability of a sample mean is shown below:

To find the probability first we have to determine the z score which is

= 1.92

Now probability is

= 0.9726

Hence, the probability of the sample mean is 0.9726

We simply applied the above formulas to determined the probability of a sample mean and the same is to be considered