How many separate samples would be needed for a two-factor, independent-measures research study with 3 levels of factor A and 3 levels of factor B? Group of answer choices 3 6 9 10
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How many separate samples would be needed for a two-factor, independent-measures research study with 3 levels of factor A and 3 levels of factor B?
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- An experimenter studies the effect of type of music during practice on recall of word lists. The researcher uses rock background music for 10 subjects, classical music for 16 others, rap music for 12, and country/western for another 15. A. How many factors does this experiment have? B. How many levels are there in the factor(s)? View keyboard shortcutsA farmer divided his piece of land into 4 equivalent groups. The quality of the soil is the same across the 4 groups of land. He planted the same crop in all 4 groups of land and recorded the yield of the crop in all 4 groups for a 4 week period. Is the study observational or experimental? If it is an experiment, what is the controlled factor? Select the correct answer below: The study is an observational study. The study is an experiment. The controlled factor is the 4 week observation period. The study is an experiment. The controlled factor is the land. The study is an experiment. The controlled factor is the growth of the crops.The district manager of Jasons, a large discount electronics chain, is investigating why certain stores in her region are performing better than others. She believes that three factors are related to total sales: the number of competitors in the region, the population in the surrounding area, and the amount spent on advertising. From her district consisting of several hundred stores, she selects a random sample of 30 stores. For each store, she gathered the following information. y = total sales last year (in $ thousands) x1 = number of competitors in the region x2 = population of the region (in millions) x3 = advertising expense (in $ thousands) The results of a multiple regression analysis, using Minitab, follow. Analysis of variance Source DF SS MS Regression 3 3050 1016.67 Residual Error 26 2200 84.62 Total 29 5250 Predictor Coefficient SE Coefficient t Constant 14.00 7.00 2.00 x1 −1.00 0.70 −1.43 x2 30.00 5.20 5.77…
- The results of a 2 factor independent samples design are presented below. The number in the cells represents the mean weight loss of participants in that cell (lbs lost in 3-month period). There are five participants in each condition. Use the data to answer the following questions. Yoga Weightlifing Crossfit Low calorie 3 5 7 Paleo 5 7 9 Describe this design using numerals (for example: 4 x 2 x 2): How many factor(s) were involved in this study (name them) and what do the levels have in common? How many total conditions were involved in this study? Is there an interaction effect? How do you know?According to the Humane Society, 33% of households in the United States own at least one cat. You are interested in determining whether the proportion of households of the students at your school that own at least one cat is different from the national proportion. Suppose you survey an SRS of students at your school and find that 25% of them own cats, which yields a p-value of .092. Interpret this p-value.A researcher would like to use a factorial study to compare two programs designed to help people stop smoking. The smoking behavior of each participant will be measured at the beginning of the program, at the end of the program, and again four months after the program has ended. Thus, the two treatment programs make up one factor, the three measurement times make up the second factor. For this study, which factor(s) should be between-subjects and which should be within-subjects? Explain your answer.
- Why a sample size of n=100 is more likely to have a percentage of pop songs closer to the population proportion of 23.6%A two-factor study with three levels of factor A (i.e., independent variable #1) and 3 levels of Factor B (i.e., independent variable # 2) uses a separate group of n = 5 participants in each treatment condition. How many participants are needed for the entire studyYou intend to conduct an ANOVA with 6 groups in which each group will have the same number of sujbects: n=12. (This is referred to as a "balanced" single-factor ANOVA.) What are the degrees of freedom for the numerator?d.f.(treatment) = What are the degrees of freedom for the denominator?d.f.(error) =
- You intend to conduct an ANOVA with 31 subjects, which will be divided into 3 treatment groups. (Because it will be impossible to have equal sized groups, this is referred to as an "unbalanced" single-factor ANOVA.) What are the degrees of freedom for the numerator? d.f.(treatment) = What are the degrees of freedom for the denominator? d.f.(error) =You intend to conduct an ANOVA with 5 groups in which each group will have the same number of sujbects: n=6n=6. (This is referred to as a "balanced" single-factor ANOVA.)What are the degrees of freedom for the numerator?d.f.(treatment) = What are the degrees of freedom for the denominator?d.f.(error) = Submit QuestionQuestion 12You intend to conduct an ANOVA with 35 subjects, which will be divided into 3 treatment groups. (Because it will be impossible to have equal sized groups, this is referred to as an "unbalanced" single-factor ANOVA.)What are the degrees of freedom for the numerator?d.f.(treatment) = What are the degrees of freedom for the denominator?d.f.(error) =