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4.A psychologist has prepared an "Optimism Test" that is administered yearly to his class. The test measures how each class feels about its future, having taken the course- the higher the score, the more optimistic the class. Last semester's class had a mean score of H =15. A sample of n= 9 students from this semester's class was selected and tested. The scores produced a mean of M= 10 and s= 3.43. On the basis of this sample, can the psychologist conclude that this semester's class has a different level of optimism than last semester's class? Use a = .05 to determine.

4.A psychologist has prepared an "Optimism Test" that is administered yearly to his class. The test measures how each class feels about its future, having taken the course- the higher the score, the more optimistic the class. Last semester's class had a mean score of H =15. A sample of n= 9 students from this semester's class was selected and tested. The scores produced a mean of M= 10 and s= 3.43. On the basis of this sample, can the psychologist conclude that this semester's class has a different level of optimism than last semester's class? Use a = .05 to determine.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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4.A psychologist has prepared an "Optimism Test" that is administered yearly to his class. The test measures how each class feels about its future, having taken the course- the higher the score, the more optimistic the class. Last semester's class had a mean score of H =15. A sample of n= 9 students from this semester's class was selected and tested. The Scores produced a mean of M= 10 and s= 3.43. On the basis of this sample, can the psychologist conclude that this semester's class has a different level of optimism than last semester's class? Use a = .05 to determine.
Transcribed Image Text:4.A psychologist has prepared an "Optimism Test" that is administered yearly to his class. The test measures how each class feels about its future, having taken the course- the higher the score, the more optimistic the class. Last semester's class had a mean score of H =15. A sample of n= 9 students from this semester's class was selected and tested. The Scores produced a mean of M= 10 and s= 3.43. On the basis of this sample, can the psychologist conclude that this semester's class has a different level of optimism than last semester's class? Use a = .05 to determine.
one-tailed or two-tailed test: State the Hypotheses; df= ta or t value for the critical region sM = %3D t D Decision:
Transcribed Image Text:one-tailed or two-tailed test: State the Hypotheses; df= ta or t value for the critical region sM = %3D t D Decision:
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