HW 3 Assignment H W 3 Chapter Eigm 1. What is the probability of obtaining a test score above 92 for a distribution with a M = 71 and an SD = 5.50 (try drawing out a normal curve with the values you need to nd if you're struggling)? (3pts) a. First compute the z-score for a score of 92 by completing the transformation equation below: z=(xMD/SD 2: Z: b. Now look in Appendix B of your textbook for the z-score you obtained. You need to gure out the probability of getting above 92. Think about what is to the left of the mean on a standard normal distribution for help. Area bit the mean and the z-seore = Area to the right of the mean total = Probability of obtaining an 92 or above = 2. Researchers studying public Communication Apprehension (that is, the level of anxiety triggered by the real or anticipated communication act) state that communication apprehension is normally distributed throughout the population. What does that mean, exactly? (2pts) Chapter Nine 3. Given the following information, would your decision be to reject or fail to reject the null hypothesis? In addition, briefly explain what your decision means for the research problem. Keep in mind that the level of significance is .05. (3pts) a. The null hypothesis that there is no relationship between a person's amount of daily ice cream consumption and her/his crime rate (p = .051). b. The null hypothesis that there is no relationship between the number of pets a person has and a person's overall happiness (p = .03). c. The null hypothesis that there is no relationship between the number of work friends and job satisfaction (p = .01). 4. Are all statistically significant findings meaningful? Provide a hypothetical example of a situation where a finding is statistically significant, but not substantively important. (2pts)