A teacher wants to test her expectations for grade distributions with the actual values. She figures that final grades in the English department should be distributed as: A, 35 % ; B, 25 % ; c, 15 % ; D, 20 % ; F, 5 % . At the end of a randomly selected semester, the following grades for 80 students were recorded in the table below. The teacher completed the calculations for the expected values and R of the A and B students. Grade Frequency Expected Value R2 24 28 0.57 22 20 0.2 C 16 D 14 F 4 Complete the last 3 rows of the table by calculating the expected values and R for the C, D, and F students. Use the table values to find the chi-square test statistic Y used to determine if the grade distribution for the department is different than expected. = 2.92 X = 2.1 = 2.35 = 0.77 0.57
A teacher wants to test her expectations for grade distributions with the actual values. She figures that final grades in the English department should be distributed as: A, 35 % ; B, 25 % ; c, 15 % ; D, 20 % ; F, 5 % . At the end of a randomly selected semester, the following grades for 80 students were recorded in the table below. The teacher completed the calculations for the expected values and R of the A and B students. Grade Frequency Expected Value R2 24 28 0.57 22 20 0.2 C 16 D 14 F 4 Complete the last 3 rows of the table by calculating the expected values and R for the C, D, and F students. Use the table values to find the chi-square test statistic Y used to determine if the grade distribution for the department is different than expected. = 2.92 X = 2.1 = 2.35 = 0.77 0.57
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question

Transcribed Image Text:A teacher wants to test her expectations for grade distributions with the actual values. She figures that
final grades in the English department should be distributed as:
A, 35 % ; B, 25 % ; c, 15 % ; D, 20 % ; F, 5 % .
At the end of a randomly selected semester, the following grades for 80 students were recorded in the
table below. The teacher completed the calculations for the expected values and R of the A and B
students.
Grade
Frequency
Expected Value
R2
24
28
0.57
22
20
0.2
C
16
D
14
F
4
Complete the last 3 rows of the table by calculating the expected values and R for the C, D, and F
students.
Use the table values to find the chi-square test statistic Y used to determine if the grade distribution for
the department is different than expected.
= 2.92
X = 2.1
= 2.35
= 0.77
0.57
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