One method of grading tests that uses a normal curve gives students letter grades depending on the standard‐deviation interval above or below the mean that contains their score: a grade of F for below −2 standard deviations D for −2 to −1 standard deviation C for −1 to +1 standard deviation B for +1 to +2 standard deviation A for above +2 standard deviations In the following, use this grading system and the fact that on a test given to 50 students the mean score was 76 and the standard deviation was 4. a. How many students received a B?
One method of grading tests that uses a normal curve gives students letter grades depending on the standard‐deviation interval above or below the mean that contains their score: a grade of F for below −2 standard deviations D for −2 to −1 standard deviation C for −1 to +1 standard deviation B for +1 to +2 standard deviation A for above +2 standard deviations In the following, use this grading system and the fact that on a test given to 50 students the mean score was 76 and the standard deviation was 4. a. How many students received a B?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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One method of grading tests that uses a normal curve gives students letter grades depending on the standard‐deviation interval above or below the
F for below −2 standard deviations D for −2 to −1 standard deviation C for −1 to +1 standard deviation B for +1 to +2 standard deviation A for above +2 standard deviations In the following, use this grading system and the fact that on a test given to 50 students the mean score was 76 and the standard deviation was 4. a. How many students received a B? b. How many students received a grade below a C? c. How many students received a grade above an F? |
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