1. The following are the scores of 20 students in an Introductory Test Exam (maximum score possible is 100):

65 7375 75 7778 78 7880 81 8182 82 8485 85 85 88 92 97

Then answer the following questions:

1. Calculate the mean and standard deviation for the above data.

1. Does this data satisfy the Empirical rule? Justify answer.

1. What is the z-score for the student who scored an 80?

1. If the z-score for a student is 0.42, what is her actual score? Round it to a whole number.