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

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Statistics

Given: trying to determine if grading practices are consistentwith the rest of their department. Historical data indicated thedepartment's overall grade distribution for the course thisinstructor 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 thecourse:

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-squaregoodness-of-fit test

Q7: construct the null and alternative hypotheses forthis test

Q8:Determine the expected counts assuming the null istrie 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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