Twenty Students Are Given an Attitude Test Before and After

Essay

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.
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What is the value of the test statistic in this problem?
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Is this a one-tailed test or a two-tailed test?
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Find the rejection region for = 0.10.
Reject when T > ______________
Using as above, can we conclude the motion picture was successful in changing attitudes?
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Conclusion: The motion picture was ______________ in changing attitudes.
At what level of significance could we reject H₀?
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