Question

With normal distribution given a number of cases, for this example let us use 100 cases. How do you find how many fall in between Z scores. What are the steps? For this example let's say Z scores -1.5 to +1.5 . I am interested in steps and explanation that can be applied to many other similar problems.

Answer 1

Solution: We have to first find the probability of the z-scores between -1.5 and 1.5.

Using the standard normal table, we have:

Now using the standard normal table, we have:

Now to find the number of cases that fall in between the z-score -1.5 and +1.5, we have: