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The target grade distribution for a particular course is 10% A, 30% B, 40% C, 15% D, 5% F. Students ...

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The target grade distribution for a particular course is 10% A, 30% B, 40% C, 15% D, 5% F. Students ...

The target grade distribution for a particular course is 10% A, 30% B, 40% C, 15% D, 5% F. Students complain that a particular professor who teaches this course grades “too hard.” The present students survey 250 former students of this professor’s class and then do aχ²goodness-of-fit test to see if the data provide sufficient evidence to support their complaint. They find a critical value of 14.7 and a test statistic of 9.8, withα= 0.10. What is the take-away conclusion from this survey?

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The professor’s grades do not conform to the target.

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The professor’s grades conform to the target.

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There is not sufficient statistical evidence to reject the idea that the professor’s grades conform to the target.

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There is sufficient statistical evidence to reject the idea that the professor’s grades conform to the target.

Textbook

Introductory Statistics: A Problem-Solving Approach

Edition: 3^rd

Author: Kokoska

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