F\'s would be grades at or below _______ what exam scores would border each lett
ID: 3173153 • Letter: F
Question
F's would be grades at or below _______ what exam scores would border each letter grade if the exam had a mean of 80 with a standard deviation of 5 (provide answers to the nearest integer)? A's would be students with scores above ______ B's would be grades above ___________ and up to _________ C's would be grades above __________ and up to _________ D's would be grades above ___________ and up to ______ F's would be grades at or below __________ ls grading on a curve always a benefit to every student? Who do you think it benefits and when? How would you feel with a grade of 72, 82, and 92 in each case? (This input box will not be automatically graded, but will be reviewed by the instructor.) A statistics instructor has decided to grade on a curve that results in the following distribution: 10% of students; B's next 20% of students; C's -middle 40% of students; D's - next 20% of -bottom 10% of students. If the exam has a mean grade of 75 with a standard deviation of 15 scores would border each letter grade (provide answers to the nearest integer)?Explanation / Answer
(a) z- score for top 10% is z = 1.2816
Cut off score = + z * = 80 + 1.2816(5) = 86.41
(b) z- score for the next segment is z = 0.5244
Cut off score = + z * = 80 + 0.5244(5) = 82.62
(c) z- score for the next segment is z = -0.5244
Cut off score = + z * = 80 - 0.5244(5) = 77.38
(d) z- score for the next segment is z = -1.2816
Cut off score = + z * = 80 - 1.2816(5) = 73.59
Answers:
A's are above 86
B's are between 83 and 86
C's are between 77 and 83
D's are between 74 and 77
F's are below 74
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