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Attitud1: Attitudes toward individuals with mental health issues prior to seeing the movie (higher scores mean more favorable attitudes towards individuals with mental health issues)
Attitud1: Attitudes toward individuals with mental health issues prior to seeing the movie (higher scores mean more favorable attitudes towards individuals with mental health issues) Attitud2: Attitudes toward individuals with mental health issues after seeing the movie The data are posted on Canvas in the files: stat_assign_11_data.txt, stat_assign_11_data.sas7bdat, and stat_assign_11_data.sav Note: The data for this assignment are made up and do not exist in nature. A movie is released where the main character has serious mental health issues that play a large part in the plot of the movie. The movie becomes quite popular and a researcher wonders whether the portrayal of the individual with mental health issues in the movie might change people's general attitudes towards individuals with mental health issues. The researcher attempts to determine this by measuring attitudes towards individuals with mental health issues in 21 people who have not seen the movie, then has them watch the movie, then remeasures their attitudes afterward. 5.) Given the description above, what are the researcher's null and alternative hypotheses? You may frame these in terms of the means for the two variables or the mean difference score. Be specific, use correct notation, and pay attention to any hypothesized directions of the effect. (1 point) 6.) Using an alpha level of .05 and a t Table, what are the critical values for the null and alternative hypotheses in #5? (1 point) 7.) Compute the standard error of the mean difference score. Show your work and go out to 4 decimal places. You may use R/RStudio, SAS Studio, or SPSS to calculate the difference scores and find the standard deviation of the difference scores, but compute the standard error yourself. (1 point) 8.) Compute the repeated-measures t test for the effect of the public service announcements on attitudes toward individual with mental health issues. Show your work and go out to 4 decimal places. You may use R/RStudio, SAS Studio, or SPSS to find the mean of the difference scores. (1 point) 9a.) Based on the critical value(s) in #6 and the t statistic in #8, should you reject or fail to reject the null hypothesis? (1 point) b.) Based on your decision, what type of error could you be making? (.5 point) 10a.) Compute Cohen's d for attitudes using the standard deviation of the difference scores. (1 point) b.) Is this a small, medium, or large effect as defined by Cohen? (.5 point) 11.) Based on your answers to 5-10, what do you conclude about the effect of the movie with regards to attitudes? That is, did the movie have effect? Be sure to include the direction of any significant effects in your answer. (1 point)
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