Does drinking alcohol affect how attractive other people seem? If so, what kinds of alcohol? To find out, Lauren had 48 participants rate the attractiveness of faces on a 0-to-10 scale after they had consumed 500 ml of either non-alcoholic beer (placebo), medium-strength beer, or strong beer. Here are the results of the omnibus ANOVA:

ShopEasy Inc. is a specialty e-tailer that operates 87 catalogue websites on the Internet. Larson Brown, Sales Director, feels that the style (colour scheme, graphics, fonts, etc.) of a website may affect its sales. He chooses three levels of design style (neon, old world and sophisticated) and randomly assigns six catalogue websites to each design style. Analysis of Larson's data yielded the following ANOVA table: Source of Variation Between Groups Within Groups Total SS 19.43 2.85 O 3.68 O 19.45 O 3.57 df 68102.33 2 34051.17 Using a = 0.05, the critical F value is MS 29177.67 15 1945.178 97280 17 F

In general, why does using a repeated-measures ANOVA increase statistical power compared to using a one-way between-groups ANOVA? Group of answer choices:  a.MSbetween is lower b.MSerror is higher c.MSerror is lower d.MSbetween is higher

A random sample of 1100 potential voters was randomly divided into 2 groups. Group 1:  500 potential voters; no registration reminders sent; 248 registered to vote Group 2:  600 potential voters; registration reminders sent; 332 registered to vote   Do these data support the claim that the proportion of voters who registered was greater in the group that received reminders than in the group that did not?  Use a 1% level of significance.

Which of these experiments sounds the most like it would be analyzed with an Independent-Samples t-test? A. A study that gives patients a placebo on Monday and measures their pain, then has them back on Friday and gives them a real pain pill and measures their pain   B. A study that compares tennis players vs. football players on their peak heart rate while playing their sports   C.A study that looks at the attention span of a group of n=30 5-year-olds and then follows up with those same kids when they are 10-years-old   D. A study that measures the knowledge of the transfer process for a group of Chaffey students, both before and after they attend an orientation