A professor predicts the distribution of grades on the final exam and records on the table below.

Calculate the X^2 (Chi squared) and the p-value based on the information below and make a decision at a 2% significance level:

GradeProportionFrequency (Observed)

A. 0.3. 3

B. 0.4. 3

C. 0.15. 4

D. 0.1 2

F. 0.05. 2

X^2 = 5.60

p-value = 0.002

Decision: Reject Ho as there is sufficient evidence to suggest that the observed class grades does not fit the expected grades

X^2 = 0.72

p-value = 0.148

Decision: Fail to reject Ho as there is sufficient evidence to suggest that the observed class grades does fit the expected grades

X^2 = 2.10

p-value = 0.752

Decision: Reject Ho as there is sufficient evidence to suggest that the observed class grades does fit the expected grades

X^2 = 4.48

p-value = 0.345

Decision: Fail to reject Ho as there is sufficient evidence to suggest that the observed class grades does fit the expected grades