Assume that the mean score on a normally distributed statistics quiz taken by 400 psychology students was 76, and the standard deviation was 8. Ben had a z-score of -1.2.
If someone gave a passing grade only to the top 25% of the class, what is the lowest score that would be considered passing?
What scores cutoff the middle 40% of grades?
Lowest grade:
Highest grade:
What proportion of students scored outside of the area between scores 66 and 86?