If I am running a two-way ANOVA and I see that both factors and their interactions are significant effects, I can say that my Y-variable is correlated with both factors.
Q: Why would researchers believe that an ordinary least squares regression is superior to a partial…
A: Ordinary least square regression is a method for obtaining a linear relationship between any…
Q: Explain the difference between the one-way fixed effects model and the one-way random effects model.
A:
Q: Studies conducted in New York City and Boston have noted that more heart attacks occur in December…
A: A confounding variable is an unidentified variable that affects the dependent and independent…
Q: The article "Americans are 'Getting the Wrong Idea' on Alcohol and Health"† reported that…
A: The correct options are Someone who is more active is more likely to seek out healthier food.…
Q: Can you prove causality with a significant Pearson Product Moment Correlation?
A: Can you prove causality with a significant Pearson Product Moment Correlation? The answer is no…
Q: This paper reports the prevalence of obesity in the US based on World Health Organization’s (WHO)…
A: Given odds ratios for the variables are, Variable Odds Overweight 1.08 Obese 1.21 Severely…
Q: When an interaction term is statistically significant, you must be cautious in interpreting the main…
A: Interactions:In ANOVA, firstly the interaction effects are found between the given variables. The…
Q: What is the relative risk for the association between men and women vs COVID-19 infection? What do…
A: Data is given for Men and women, vs Covid infection ( Covid positive and Covid negative We have to…
Q: In single-factor ANOVA, when the calculated value of the test statistics, F*, is greater than the…
A: We want to tell you which one is the correct choice.
Q: In MANOVA, main effects and interaction are assessed on multiple dependent variables (DVs). True or…
A: MANOVA: MANOVA (one-way multivariate analysis of variance) is used to determine the significant…
Q: The blood pressure and weight of Jellystone Park bears are correlated with and .6 is the correlation…
A: Introduction: Consider that x is the independent variable and y is the dependent variable. The size…
Q: Explain why the null hypothesis should not be accepted when the effect is not significant?
A:
Q: Like many studies that involve BMI, the above studies are using BMI as a proxy for fat, and fat as a…
A: BMI- Body mass index, used as a measure to steady health
Q: If remedial measure is applied to address the problem of multicollinearity in the model, do you…
A: Multicollinearity (MColl) exists when independent variables (IVs) are dependent on each other.
Q: Compared to observational studies like cohort and case-control studies, experimental studies like…
A: Given, The statement to check true or false? To find, Experimental studies like RCTs are…
Q: For a repeated-measures study, a small variance for the difference scores indicates that the…
A:
Q: oup) was asked to consume the health drink for a certain period of time and the other group (the…
A:
Q: What is the Beta that shows the strongest controlled association?
A: Standardized Beta Coefficient A standardized beta coefficient compares the strength of the effect of…
Q: If the omitted variable is negatively correlated with the treatment (x1,x2)0), then the effect of b1…
A: Introduction: Consider a multiple regression model with response variable, y, and two explanatory…
Q: A. If the results were statistically significant, can the results of this study be generalized to a…
A: The study involved 350 volunteers over the age of 60 years. Each subject was assigned to a treatment…
Q: In a 2 × 3 between-subjects ANOVA with dfWithin = 17 and alpha set at .05, what is q if one is…
A: Given information: The level of significance is α = 0.05. The degrees of freedom for error is…
Q: sed on a two-tailed t-test,what will be the conclusion of the significance test for this correlation…
A: From there results of first question, the correlation value is 0.97.
Q: In a two-way ANOVA with interaction, a significant interaction term indicates that.
A: Two-way ANOVA: A statistical technique is used for analyzing the two or more than two means.…
Q: In a two-way ANOVA, why is the test for interaction done first?
A: Purpose of conducting interaction test first: If there is no interaction effect present in the…
Q: what happens to the F-statistic if two variances are different?
A: The two variances are different hence the F-statistic are as follows,
Q: Night and Haslam 2010 found that office workers who had some input into the design of their office…
A: The Independent Variable is office workers who had some input into the design of their office…
Q: If the difference in means of two data sets is not zero, does that imply that on average the two…
A: In this we need to find whether the difference in means of two data sets is not zero, the does it…
Q: Which of the following can cause OLS estimators to be biased?(i) Heteroskedasticity.(ii) Omitting an…
A: Introduction: Heteroskedasticity is a situation in regression analysis, when the variability of the…
Q: In a two-way ANOVA, the interpretations of the main effects make sense only when the interaction…
A:
Q: 2 and age 4 compared to children who drank whole or 2% milk (Scharf, Demmer, and DeBoer, 2013). Is…
A: Experimental research is a research method in which the control variables are manipulated to judge…
Q: What is negatively correlated?
A:
Q: 28. In a Two-Way ANOVA, it is possible to get a significant interaction effect even if the main…
A: Given info: In a two-way ANOVA, it is possible to get a significant interaction effect even if the…
Q: Does the overall alpha level change if you use a one-tailed test vs. a two tailed test? why or why…
A: Yes. The overall alpha level changes if compared to one-test verses a two tailed test. The alpha…
Q: A group of disabled women ages 65 and older were followed for several years. It was found that those…
A: In the following question it being observed that is there a cause and affect relationship between…
Q: If there is an overall significant F in a one way ANOVA, can we conclude that the group membership…
A: As per the alternative Hypothesis for one way ANOVA is "At least one pair of treatments means are…
Q: Describe how the goal of an experimental research study is different from the goal for…
A:
Q: Over the course of a year, you find a strong, positive correlation between ice cream sales and pool…
A: Correct option is Spurious
Q: Suppose two variables are negatively correlated. Does the response variable increase or decrease as…
A: Suppose X and Y are two variables which are negatively correlated. Correlation (X,Y)<0
Q: nitive Processing Therapy (CPT) more effective in treating PTSD than Prolonged Exposure therapy…
A: Experimental research design is based on data to derive a conclusion based on the majority cases in…
Q: Suppose that a large controlled experiment tests whether caffeine improves reaction times. A very…
A: Given that experiment finds a strong negative correlation between caffeine dose and reaction time.
Q: Think of a research scenario for which either 1-way or 2-way ANOVA would be needed to analyze the…
A: ANOVA is splitting up of total variance into variance due to several factors and variance due to…
Q: What is the “third factor” problem concerning correlational studies as it relates to inferring…
A: The correlation between any two variables is the linear relationship between those variables, but it…
Q: Compared to an independent-measures design, a repeated-measured study is more likely to find a…
A: From the given information, Independent –measure design: An independent measures design is a…
Q: even though we may observe a strong relationship between the explanatory and response variables, a…
A: A dependent variable (or response variable) is a variable that has been examined or evaluated in a…
Q: The article "Americans are 'Getting the Wrong Idea' on Alcohol and Health"† reported that…
A: The correct options are, b.Someone who is more active is more likely to seek out healthier food.…
Q: Is the dependent variable is always dependent to the independent variable(s) of the study? Why?
A:
Q: Observational studies can reveal only association, whereas designed experiments can help establish…
A: Here we want to determine correct choice.
Q: A type 2 error occurs when a treatment actually does have an effect on the scores but the effect was…
A: True. we know that, type 2 error occurs when we fail to reject Null hypothesis when it is actually…
Step by step
Solved in 2 steps
- What is an experiment?1a. Should post-hoc tests be run if a researcher has failed to reject the null hypothesis for an ANOVA? Explain why or why not. 1b. The total variability in an ANOVA contains which two subtypes of variability?A researcher is trying to determine which treatment method—sleeping longer hours, using a moisturizing cream, or drinking increased amounts of water—is best for reducing skin dryness. Which procedure should she use? Group of answer choices; Mean Independent samples t-test ANOVA Correlation
- Recent research indicates that the effectiveness of antidepressant medication is directly related to the severity of the depression (Khan, Brodhead, Kolts & Brown, 2005). Based on pretreatment depression scores, patients were divided into four groups based on their level of depression. After receiving the antidepressant medication, depression scores were measured again and the amount of improvement was recorded for each patient. The following data are similar to the results of the study.Run the single-factor ANOVA for this data: LowModerate HighModerate ModeratelySevere Severe 3 2.7 3.4 4.6 2.1 1.6 3.6 3.5 2.4 2.4 2.8 3.1 1.8 2 3.1 2.5 2.2 2.2 3.4 3.4 0 2.3 4.7 3.1 Fill in the summary table for the ANOVA test: S.S. d.f. M.S. Between Within TOTAL From this table, obtain the necessary statistics for the ANOVA:F-ratio: p-value: η2= What is your final conclusion? Use a significance level of α=0.01. There is a significant…When should you use a one-way ANOVA to analyze your data? Distinguish between one–way ANOVA for independent groups and a one–way Repeated Measures ANOVA.What is H0 for a one-way ANOVA? If H0 is rejected, does that imply that each mean is significantly different from every other mean? What information do you need to decide on a sample size that will provide adequate statistical power? If there is an overall significant F in a one-way ANOVA, can we conclude that the group membership or treatment variable caused the observed differences in the group means? Why or why not?
