The Target Grade Distribution for a Particular Course Is 10

question 16

Multiple Choice

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 a χ2 goodness-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, with α = 0.10.What is the take-away conclusion from this survey?

• A) The professor's grades do not conform to the target.
• B) The professor's grades conform to the target.
• C) There is not sufficient statistical evidence to reject the idea that the professor's grades conform to the target.
• D) There is sufficient statistical evidence to reject the idea that the professor's grades conform to the target.

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Definitions:

Isoprene

A common organic compound with the formula C5H8, used as a monomer in the production of natural and synthetic rubbers.

Steroids

A class of lipophilic compounds characterized by a core structure of four fused carbon rings, varying by the functional groups attached and serving in various biological roles.

Sesquiterpene

A class of terpenes that consist of three isoprene units and have the molecular formula C15H24.

Steroid

A type of organic molecule with a characteristic molecular structure containing four rings of carbon atoms (three six-membered and one five-membered).