1. The average score of a statistics class was 71 with a standard deviation of 8.

A) What is the z score of a student with a grade of 68?

B) What is the z score of a student with a grade of 80?

2. Using the same data in #1 answer the following:

A. Approximately 68% (one standard deviation) of the scores are between ________ and _________

B. Approximately 95% (two standard deviation) of the scores are between _________ and _________