4. I have reviewed the midterm grades, and I am
trying to predict how well the...
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4. I have reviewed the midterm grades, and I amtrying to predict how well the class will do on the final exam. Thefrequency values are actual grades for the Summer II midterm:
Grade
Expected
Frequency (Observed)
Greater than A
5
7
A
6
9
B
8
4
C
3
4
D
1
0
F
2
1
a. What will be my degrees of freedom?
b. What is O-E (difference) for grades of B?
c. What is O-E^2 for grades of A?
d. What is (O-E)^2/E for grades of F?
e. What is O-E (difference) for grades of B?
f. What is the chi square (?2) test statistic?
g. What is the p-value?
h. At the 5% significance level, what is yourdecision?
i. What is the reason for the decision?
j. What is the conclusion in full sentences?
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