Ice R.

asked • 09/02/16

68-95-99.7 Rule

Suppose that the scores on particular FDMAT 108 unit exam at BYU-Idaho were approximately normally distributed with a mean of 77 and a standard deviation of 8.

1. About what percentage of the scores were above 93 for this unit exam? _____

2. Suppose that a cutoff score at 2 standard deviations below the mean or higher may constitute a passing grade, what was the cutoff score for a passing grade on this unit exam?_____

3. What is the standard score for a unit exam score of 66? ____

2 Answers By Expert Tutors

By:

Randi G. answered • 09/02/16

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