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$4.00 A researcher predicts that watching a fi

From Psychology: Psychological-Statistics
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Due on Apr. 02, 2012
Asked on Mar 30, 2012 at 8:04:16PM

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A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about their attitudes. The mean score on the questionnaire for these 36 students is 70. The score for a similar class of students who did not see the film is 75. The standard deviation is 12. Using the five steps of hypothesis testing and the 5% significance level (alpha), does showing the film change students’ attitudes towards the chronically mentally ill?, a. What is your null hypothesis? Alternate hypothesis? , b. Is this a one-tailed or two-tailed hypothesis? , c. What is your obtained z? , d. What is the critical value for z? , e. Do you reject or fail to reject the null hypothesis? , f. State in words what you have found.