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:

Meditation

A practice where an individual uses a technique, such as mindfulness or focusing the mind on a particular object, thought, or activity, to train attention and awareness, and achieve a mentally clear and emotionally calm state.

Yoga

A physical, mental, and spiritual practice or discipline that originated in ancient India, aimed at achieving a state of perfect spiritual insight and tranquility.

Surnames

Surnames are family names passed down through generations, often used to identify individuals within a wider family context, reflecting lineage, heritage, and sometimes social status or occupation.

Mother's Name

Typically refers to the given name or full name of an individual's mother, which may be used for identification, legal, or cultural purposes.