A population distribution is normal with a meanof 25 and a standard deviationof 5.

If a piece of datum is randomly taken from this distribution, what is the probabilitythat it is less than 20?

If a sample of 4 pieces of dataare taken from this distribution, what is the probability that the mean will be less than 20?

A population distribution is normal with a mean of 25 and a standard deviation of 5.

If a piece of datum is randomly taken from this distribution, what is the probability …

Calculations are given to find the probability that randomly selected data will be less than 20 in this distribution.