The standard normal distribution is a probability distribution with a mean of 0 and a

standard deviation of 1. Compare raw scores from different scales by converting them to Z

scores (same as standardizing values). Recall that z = (X-M)/s (where X = the score, M is the mean of

the sample, and s is the standard deviation.

a. A population was normally distributed with a mean of 8 and SD of 3.

What proportion of the scores are below 10?