If a factorial study involves a significant interaction,O there can be no significant main effects.O any main effects might have been obscured by the interaction.O all main effects have to be considered together.O the result is an ex post facto study.

Given problem Given that If a factorial study involves a significant interaction, Ans) any main…

Answered: If a factorial study involves a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You are a researcher examining student success at Kern County colleges and universities. You noticed that majority of students in Kern County are not performing as well as the students in Los Angeles County and San Luis Obispo County. Therefore, you decided to research factors that influence student success. One factor repeated in several literatures is a support system. Previous literature indicated that students who have a support system that values education will perform better in higher education than students who do not have a support system that values education. You decided to assess the support system of students in Kern County. Your independent variable is “support system.” You have two levels for your support system “students with a support system that values education” and “students without a support system that values education.” Your dependent variable that you are measuring is “college success.” You are measuring college success by assessing the student’s GPA. You…
Answer true or false to each of the following statements and explain your answers. a. In a two-way ANOVA, if there is an interaction between Factor A and Factor B, then there must be a main effect due to at least one of the factors.b. In a two-way ANOVA, if there is no Factor A main effect and no Factor B main effect, then there can be no interaction effect between Factor A and Factor B.
11) Consider each of the following scenarios and state whether the variable in question is a confounder, or whether more information is needed to assess confounding. Choose from Yes / No / or Need more information, and provide a very brief explanation for your selection a) In a cohort study of liver cancer among males, incidence rates of liver cancer among men with unhealthy alcohol use are compared to incidence rates of liver cancer among non-drinkers. Is gender a confounder in this study? b) A case-control study of the risk of beer consumption and oral cancer among men (overall OR = 2.8). In this study, cigarette smoking is associated with beer consumption and is a risk factor for oral cancer among both beer drinkers (OR=3.6) and nondrinkers (OR=3.7). Is cigarette smoking a confounder in this study? c) In a study of the risk of pulmonary hypertension among women who take diet drugs to lose weight, the crude relative risk of pulmonary hypertension comparing diet drug users to…
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A doctor wanted to study the effect of four different treatments on mental health. A group of 100 adults experiencing depression volunteered for the study. The doctor randomly assigned one-fourth of them to each of four groups. Group 1 followed a specific exercise plan, group 2 followed a specific diet plan, group 3 followed an exercise and diet plan, and group 4 did not follow any plan. After 4 weeks, the doctor contacted each participant and asked them if they felt any better. The results are displayed in the table. The doctor would like to know if these data provide convincing evidence that the distribution of responses differs across the treatment groups in the population of all patients like these. The random condition is met. The 10% condition is not needed because random sampling did not take place. This table of expected counts shows that all expected counts are at least 5. What is the value of the chi-square test statistic? χ‑2 = 5.03 χ‑2 = 6.26 χ‑2 = 25.33 χ‑2 = 39.22

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If a factorial study involves a significant interaction, O there can be no significant main effects. any main effects might have been obscured by the interaction. all main effects have to be considered together. the result is an ex post facto study.