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December 21, 2014

Homework Help: Statistics

Posted by Lee on Monday, March 5, 2012 at 1:28pm.

A researcher predicts that watching a film on institutionalization will change studentsí 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 (i.e. alpha = .05), does showing the film change studentsí attitudes towards the chronically mentally ill?

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