Question 1.93

1.93 Total scores for accounting course.

Following are the total scores of 10 students in an accounting course:

acct

62 93 54 76 73 98 64 55 80 71

Previous experience with this course suggests that these scores should come from a distribution that is approximately Normal with mean 72 and standard deviation 10.

  1. Using these values for and , standardize the scores of these 10 students.
  2. If the grading policy is to give a grade of A to the top 15% of scores based on the Normal distribution with mean 72 and standard deviation 10, what is the cutoff for an A in terms of a standardized score?
  3. Which students earned an A for this course?

1.93

(a) The standardized values are: -1, 2.1, -1.8, 0.4, 0.1, 2.6, -0.8, -1.7, 0.8, -0.1. (b) 85 percentile ? . (c) Only two scores, the 93 and the 98.