Answer the following question?

Independent t-test A researcher was interested in examining the effect of color on memory performance. The participants were divided into two groups. One group recalled a list of words printed in black while the other group recalled a list of words printed in multiple colors. Can he conclude that color has an effect on memory performance. Condu a two-tailed test with u = .05. Be sure to include your entire computation. 1. State both null and research hypotheses in complete sentences. 2: Set up a decision-making criterion. Be sure to draw an accurate picture. 3: Compute the t-value. 4: State your conclusion thoroughly! 2/6 Z-test Dr. Smith was interested in examining if weekly exercise would produce a change in the stress levels among individuals in the population. In general population of college students. scores on a standardized stress test that are normally distributed with the mean it = 2t] and standard deviation e = 5. Because it was not feasible to as]: everyone in the population to exercise weekly. a sample of n : [6 individuals was selected. and the exercise training program was given to this sample. Following the training. the average stress some for this sample wars 1'? = IT. Can the researcher eonclutle that esereise would have an effect on stress levels? Use a two-tailed test and u - .05. Be sure to show all four steps. Write clearly! 1: State both null and research hypotheses in complete sentences. 2: Set up a decision-making criterion. Be sure to draw an accurate picture. 3: Compute the z-score. 4: State your conclusion thoroughly! Dependent t-test A researcher was interested in examining the effect of a new drug on depression levels. A group of clients was recruited and tried the new drug for three months. These scores indicate their depression scores before and after drug. Did the drug have an effect on the depression levels? Be sure to include your entire computation. Conduct a twotailed test with u = .05. 1. State both null and research hypotheses in complete sentences. 2: Set up a decision-making criterion. Be sure to draw an accurate picture. 3: Compute the t-value. 4: State your conclusion thoroughly! 3/6