SCENARIO 9-9 The President of a University Claimed That the Entering Class

question 181

Multiple Choice

SCENARIO 9-9
The president of a university claimed that the entering class this year appeared to be larger than the entering class from previous years but their mean SAT score is lower than previous years.He took a sample of 20 of this year's entering students and found that their mean SAT score is 1,501 with a standard deviation of 53.The university's record indicates that the mean SAT score for entering students from previous years is 1,520.He wants to find out if his claim is supported by the evidence at a 5% level of significance.
-Referring to Scenario 9-9,which of the following best describes the Type II error?

• A)The president concludes that the mean SAT score of the entering students is lower than previous years when it is indeed not lower.
• B)The president concludes that the mean SAT score of the entering students is higher than previous years when it is indeed not higher.
• C)The president concludes that the mean SAT score of the entering students is not lower than previous years when it is indeed lower.
• D)The president concludes that the mean SAT score of the entering students is not higher than previous years when it is indeed higher.

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Definitions:

Self-Efficacy

The perception a person has of his or her ability to perform competently whatever is attempted.

Heritability Of Traits

A measure of how much genetic factors contribute to individual differences in observable traits within a population.

Personality Differences

Variations in the patterns of thinking, feeling, and behaving that distinguish one person from another.

Genetic Differences

Variations in the DNA sequence among individuals, contributing to the diversity in physical and behavioral traits.