I've been struggling with the question all day and I'm at a complete loss.

l4 ptsl the one-tailed z-test A psychologist is interested in whether people are more depressed than usual after this past year of the COVID-19 pandemic. She uses a 7-point mental health scale, where 1 indicates not depressed and 7 indicates very depressed. It is known that the population mean for this scale is u = 4, with a standard deviation of o = 1.9. In her study, the psychologist randomly sampled n=2100 people and found that their mean mental health score was Mpandemic = 5.3. Conduct a 2- test using an alpha-level of o. = .05. a. What is the research hypothesis, H1? H1: b. What is the null hypothesis, H0? H0: c. What is the critical value of z for this study? zcrit = {be sure to include + or - in your answer) cl. Draw a picture of the distribution of sample means. Indicate on the xaxis: z= -2, -1, 0, +1, +2 and zcrit e. What is the mean of the distribution of sample means? 1.1M = f. What is the standard deviation of the distribution of sample means? 5M = g. What is the z-score of the sample mean for this study? 2 = h. With these results, can the researcher reject the null hypothesis? YES/ NO {circle one) i. With these results, can the researcher accept the research hypothesis? YES! NO {circle one} j. If the psychologist were to reject the null hypothesis based on these results, what is the probability that she has made an error by doing so