Main Post: Sadie Abdullah Select the correct answer. Suppose one experimenter decides to test a treatment with only one experimental group and one control group, while another experimenter tests different levels of the same treatment with three different groups of participants. How will this affect the way in which the two experimenters conduct their statistical analysis? a. the first should use a lower significance level than the second b. the second should analyze differences in groups means while the first should analyzed differences in group variability. d. the first would conduct a t test, while the second would start with an analysis of variance and (if significant) then conduct post hoc tests to determine which groups are significantly different. Select the correct answer. Colin has always heard the saying \"blondes have more fun\" and he wants to see if it's true. He's not sure what \"have more fun\" means, so he just decides to find out if blondes are happier. He randomly samples blondes, brunettes, and redheads on his campus and administers a validated happiness scale to each. He conducts 3 separates independent samples t tests on the dependent variable of happiness. What did Colin do wrong? a. there is no need to conduct the t tests - he can simply compare the sample means of the three groups to see which ones are different c. Conducting multiple tests is inappropriate because it will inflate the risk of a Type 1 error beyond .05; he should have conducted an ANOVA and conducted appropriately adjusted posthoc tests. b. a one-way ANOVA would have told him which pairs of means were significantly different. c. conducting multiple t tests is inappropriate because it will inflate the risk of a Type 1 error beyond .05; he should have conducted an ANOVA and conducted appropriately adjusted posthoc tests d. nothing; his procedure and analysis are correct Discuss confidence intervals and explain how the information obtained is different from a point estimate. How does sample size affect the width of the confidence (e.g., 95% vs. 99%) affect the width of the confidence interval, holding all other factors constant? Discuss the process of hypothesis testing, including the steps. Please discuss three salient points from the films