Question

In: Statistics and Probability

Given: trying to determine if grading practices are consistent with the rest of their department. Historical...

Given: trying to determine if grading practices are consistent with the rest of their department. Historical data indicated the department's overall grade distribution for the course this instructor teaches is the following:

A/A-: 54% B+/B/B-: 28% C+/C/C-: 11% D+/D/D-: 3% F: 2% other: 2%

following the semester final grades are shown below for the course:

A/A-: 53 B+/B/B-" 36 C+/C/C-: 12 D+/D/D-: 5 F:1 other: 3 total: 110 to test this consistency, the instructor will use a chi-square goodness-of-fit test

Q7: construct the null and alternative hypotheses for this test

Q8:Determine the expected counts assuming the null is trie for the following categories. A/A-, B+/B/B-, C+/C/C-, D=/D/D-, F, other

Q9: perform the chi-square goodness-of-fit test at the .05 significance level

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