Exam 5: Normal Distributions

An instructor transforms her students' scores on a midterm into standardized (z) scores. The distribution of standardized scores ______.

What percentage of z-scores in the standard normal distribution are less than z = .80?

In which of the following ways is the standard normal distribution different from other normal distributions?

What percentage of z-scores in the standard normal distribution are greater than z = -1.40?

What percentage of z-scores in the standard normal distribution are between z = -.33 and z = .33?

"Imagine you are president of a toy company that builds video games. You have determined that the time needed to build these games is normally distributed with a mean of 20 minutes and a standard deviation of 5 minutes." 5% of the video games (the bottom 5%) take less than ______ minutes to build.

The shaded area in this distribution is most likely to represent ______.