2) A researcher is interested in how much visual cues impact language comprehension. One group listens to a speaker while watching them speak. The second group listens to a speaker, but they are blindfolded. The number of comprehension mistakes is noted for each participant. Do people with visual cues make fewer mistakes than those without? Use the data below to complete items ad below. With Visual Without Cues Visual Cues 1 15 3 11 2 13 Mean = 2 Mean = 13 Variance = 1 Variance = 4 a. We are going to use an independent samples t-test to analyze this data. Explain why that is the correct test for this situation. b. Calculate the independent samples ttest using a two-tailed test and an alpha level of .05. (Note that I provided some of the information in this problem that will aid in your hand-calculations, but not all. You will need to calculate a few additional steps for this problem than you did for #1.) c. Write the result in APA style. d. Calculate the 90% condence interval for the data. Based on the interval, is there a difference between groups? (Remember that you might need to re-calculate the critical value.)