Asked by Julian Torres on Jun 23, 2024
Verified
Twenty students are given an attitude test before and after viewing a motion picture designed to change their attitudes favorably toward a new curriculum. A high score indicates a favorable attitude and a low score indicates an unfavorable attitude, with the scores ranging from 1 to 30. This problem will use the sign test on the data given below to see if we can conclude the motion picture was successful in improving attitudes. Describe what the test statistic is for the sign test.
________________________________________________________
What is the value of the test statistic in this problem?
______________
Is this a one-tailed test or a two-tailed test?
______________
Find the rejection region for = 0.10.
Reject when T > ______________
Using as above, can we conclude the motion picture was successful in changing attitudes?
______________
Conclusion: The motion picture was ______________ in changing attitudes.
At what level of significance could we reject H0?
______________
Sign Test
A non-parametric test used to determine if there is a median difference between two related samples.
Attitude Test
An assessment designed to determine a person's feelings or opinions about various subjects.
Motion Picture
Another term for a movie or film, a sequence of images displayed rapidly to create the illusion of motion.
- Use the sign test and discern its consequences.
- Understand the significance of the sign test in relation to the Wilcoxon Signed-Rank test.
Verified Answer
DL
Daniel LuciaJun 27, 2024
Final Answer :
Let x be the number of times the "After" measurement was larger than the "Before" measurement; that is, number of times where (After - Before) is positive.; 13; one-tailed; 12; Reject the null hypothesis; successful; .058
Learning Objectives
- Use the sign test and discern its consequences.
- Understand the significance of the sign test in relation to the Wilcoxon Signed-Rank test.
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