To test the hypothesis in exercise 1, the admissions counselors select a random

Question

To test the hypothesis in exercise 1, the admissions counselors select a random sample of freshman and compare their scores on the SAT to those of the population of upperclassman. They find that the freshman do in fact have a higher mean SAT score. However what they are unaware of is that the sample of freshman was not representative of all freshman at Brainy University. In fact, the sample over represented those with high scores and underrepresented those with low scores. What type of error (Type I or Type II) did the counselors make?

Explanation / Answer

Ho: Freshman do not have higher mean SAT score

Ha: Freshman do have higher mean SAT score

The decision is to reject Ho when Ho is true. It is type I error

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