Ask Question
16 April, 06:23

A student of one of the authors earned grades of 63, 91, 88, 84, and 79 on her five regular statistics tests. She earned a grade of 86 on the final exam and 90 on her

class projects. Her combined homework grade was 70. The five regular tests count for 60%

of the final grade, the final exam counts for 10%, the project counts for 15%, and homework

counts for 15%. What is her weighted mean grade? What letter grade did she earn (A, B, C, D,

or F) ? Assume that a mean of 90 or above is an A, a mean of 80 to 89 is a B, and so on.

+1
Answers (1)
  1. 16 April, 07:49
    0
    Weighted mean grade: 81.2

    Letter grade: B

    Step-by-step explanation:

    5 regular tests:

    (63+91+88+84+79) / 5 * 60%

    = 405 / 5 * 0.6

    = 48.6

    Final exam:

    86 * 10% = 8.6

    Project:

    90 * 15% = 13.5

    Homework:

    70 * 15% = 10.5

    So her weighted mean grade is

    48.6 + 8.6 + 13.5 + 10.5 = 81.2
Know the Answer?