A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years. It is known that the overall grade distribution for the department in 1985 had 14% As, 26% Bs, 31% Cs, 19% Ds, and 10% Fs. A sample of n = 200 psychology students from last semester produced the following grade distribution: A |B |C |D |F 32|61|64|31|12 Do the data indicate a significant change in the grade distribution? Test at the .05 level of significance.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A professor in the psychology department would like
to determine whether there has been a significant
change in grading practices over the years. It is known
that the overall grade distribution for the department in
1985 had 14% As, 26% Bs, 31% Cs, 19% Ds, and 10%
Fs. A sample of n = 200 psychology students from last
semester produced the following grade distribution:

A |B |C |D |F

32|61|64|31|12

Do the data indicate a significant change in the grade
distribution? Test at the .05 level of significance.

 

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