Psychological stats 2Assignment 2: Conducting a z-TestA 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 people in general on this questionnaire is 75, with a standard deviation of 12. Using the five steps of hypothesis testing and the 5% significance level (i.e. alpha = .05), does showing the film change students’ attitudes towards the chronically mentally ill?What does it mean to set alpha at .05?What is your null hypothesis? Alternate hypothesis?Is this a one-tailed or two-tailed hypothesis?What is the critical z?Calculate the obtained z. Do you reject or fail to reject the null hypothesis?State in words what you have found.Assignment 2 Grading CriteriaMaximum PointsExplained what it means to set alpha at .05.11Correctly identified the null and alternative hypotheses.11Correctly identified and explained whether theirs is a one-tailed or two-tailed hypothesis.11Correctly identified the critical z.11Used obtained z and explained whether one would reject or fail to reject the null hypothesis, and state in words what the findings were.20Wrote in a clear, concise, and organized manner; demonstrated ethical scholarship in accurate representation and attribution of sources; displayed accurate spelling, grammar, and punctuation.16Total:80