Identify the four research situations using ANOVA to test the null hypothesis.Select one or more:a.two-factor analysis for independent groups designsb.single-factor analysis of dependent groupsc.multiple-factor analysis for mixed designsd.single-factor analysis for repeated measures designse.two-factor analysis for dependent groups designsf.two-factor analysis for mixed designsg.single-factor analysis of independent groups designs

A study is designed to test the effectiveness of a program to teach adolescents about nutrition. All research participants are randomly assigned to two groups, one which goes through the program and the other which does not. Both before and after the program, all participants take a test measuring knowledge of nutrition. What type of experimental design is this? A. posttest-only control group design B. pretest-posttest control group design C. 2 × 2 factorial design D. 2 × 4 factorial design

Post-hoc analyses are important for:Question 2Answera.carrying out further analysis specifically on the means that showed the greatest difference when reporting the descriptive resultsb.calculating the effect size of each factorc.Double-checking that the ANOVA result was significant and not due to a type 1 errord.testing which pairs of conditions are significantly different after the ANOVA has been carried out

Before completing the ANOVA in r, we use the factor() function to:Question 3Answera.collate our datab.to test for an association between the variablesc.to define what type of ANOVA we are carrying out: independent-sample or repeated-measuresd.define the arrays, that make up our independent variables, as factors

A two-factor ANOVA with two independent groups variables that each have three levels requires ____ groups of participants in total. 6 4 5 9

In which one of the following situations would it be most appropriate to use an ANOVA to analyze the data? In order to determine the effectiveness of different diet plans, 90 people are randomly assigned to one of three groups: (1) low calorie diet, (2) low-fat diet, or (3) low-carb diet. At the end of 60 days, the number of pounds lost was recorded for each of the participants. A researcher is interested in determining the most effective format for advertising. He randomly assigns 60 people to one of three groups: (1) television commercial, (2) radio commercial, or (3) magazine advertisement. Group members review the commercial and then report whether or not they would buy the product.