A teacher informs her psyhcology class (of 500+ students) that a test was very difficult, but the grades would be curved. Scores on the test were normally distributed with a mean of 45 and a standard deviation of 6.9. The maximum possible score on the test was 100 points. Because of partial credit, scores were recorded with 1 decimal point accuracy. (Thus, a student could earn a 45.2, but not a 44.43.) The grades are curved according to the following scheme. Find the numerical limits for each letter grade. Interval Letter Scheme A Top 8% Scores above the bottom 71% В and below the top 8% Scores above the bottom 29% and below the top 29% Scores above the bottom 8% D and below the top 71% F Bottom 8% C.
A teacher informs her psyhcology class (of 500+ students) that a test was very difficult, but the grades would be curved. Scores on the test were normally distributed with a mean of 45 and a standard deviation of 6.9. The maximum possible score on the test was 100 points. Because of partial credit, scores were recorded with 1 decimal point accuracy. (Thus, a student could earn a 45.2, but not a 44.43.) The grades are curved according to the following scheme. Find the numerical limits for each letter grade. Interval Letter Scheme A Top 8% Scores above the bottom 71% В and below the top 8% Scores above the bottom 29% and below the top 29% Scores above the bottom 8% D and below the top 71% F Bottom 8% C.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 22PFA
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Transcribed Image Text:A teacher informs her psyhcology class (of 500+ students) that a test was very difficult, but the grades
would be curved. Scores on the test were normally distributed with a mean of 45 and a standard deviation
of 6.9. The maximum possible score on the test was 100 points. Because of partial credit, scores were
recorded with 1 decimal point accuracy. (Thus, a student could earn a 45.2, but not a 44.43.)
The grades are curved according to the following scheme. Find the numerical limits for each letter grade.
Letter
Scheme
Interval
A.
Top 8%
Scores above the bottom 71%
and below the top 8%
Scores above the bottom 29%
and below the top 29%
Scores above the bottom 8%
and below the top 71%
F
Bottom 8%
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