b) a student tests 100 students to determine whether other students on her campus prefer soda brand a or soda brand b and finds no evidence that preference for brand a is not 0.5. later, a marketing company tests all students on campus and finds no difference. choose the correct answer below.

First the student carried out a study which provided no evidence that the preference for brand A was not 0.5 or 50%, then the marketing company carried out a similar study and showed the same results. Since we are trying to determine if the student's research was well done, we must assume first that the marketing company did their research correctly.

If the student had rejected the claim of the marketing company, then she would have made a type I error (which didn't happen). If the student had wrongly accepted the claim from the marketing company (without any evidence of her own), then she would have made a type II error.

Since both studies provided the same conclusions, then we can assume that the student carried out her study in a proper and correct manner.

​b) a student tests 100 students to determine whether other students on her campus prefer soda brand a or soda brand b and finds no evidence that preference for brand a is not 0.5.​ later, a marketing company tests all students on campus and finds no difference. choose the correct answer below.

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b) a student tests 100 students to determine whether other students on her campus prefer soda brand a or soda brand b and finds no evidence that preference for brand a is not 0.5. later, a marketing company tests all students on campus and finds no difference. choose the correct answer below.