A Professor Finds That the Average SAT Score Among All

question 58

Multiple Choice

A professor finds that the average SAT score among all students attending his college is 1150±150 ( ) .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

---

Definitions:

Dental Plaque

A sticky, colorless or pale yellow film that is constantly forming on your teeth, consisting of bacteria, saliva, and food particles.

Chlorhexidine Rinses

Antimicrobial mouthwash used to reduce bacteria in the mouth and help prevent oral infections.

Human Body

The complete structure of a human being encompassing physical and physiological attributes, including organ systems and functions.

Regulate Body Temperature

The physiological adjustments made by the body to maintain a stable internal temperature despite external changes.