A Professor Finds That the Average SAT Score Among All $\mu$

question 80

Multiple Choice

A professor finds that the average SAT score among all students attending his college is 1150 ± 150 ( $\mu$ ± $\sigma$ ) .He polls his class of 25 students and finds that the average SAT score is 1200.Suppose he computes a one-sample z test at a .05 level of significance.What is his decision?

• A) to reject the null hypothesis
• B) to retain the null hypothesis
• C) to reject the null hypothesis for a two-tailed test, but to retain the null hypothesis for an upper-tailed test
• D) to reject the null hypothesis for an upper-tailed test, but to retain the null hypothesis for a two-tailed test

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Definitions:

Object Permanence

The understanding that objects continue to exist even when they cannot be seen, heard, or touched, typically developed in infancy.

Conservation

In environmental science, refers to the preservation, protection, or restoration of the natural environment and wildlife.

Identity Achievement

A stage in adolescent development where individuals have explored and committed to a set of personal beliefs and goals.

Object Permanence

The understanding that objects continue to exist even when they cannot be seen, heard, or otherwise sensed, which develops in early infancy.