How do you find the first second and third quartiles when on

How do you find the first, second, and third quartiles when only given the mean and standard deviation of a normally distributed sample?

Solution

If you have a standard normal table handy(also known as unit normal table or Z table), then P(z < 0.675) ? 0.75 (0.75 means that this is the 3rd quartile),
and going by the formula z = (x -