If there is a significant interaction in a factorial design, why do researchers typically ignore (or minimize the importance of) the main effects?
Q: Set up the ANOVA table (to 2 decimal, if necessary). Round p-value to four decimal places. Source of…
A: We have used R studio to run the two-way Anova. The code is as under library(readxl)df <-…
Q: Develop conceptual framework using the hypotheses below: H1: Compensation package has a positive…
A: The given hypotheses are given below: H1: Compensation package has a positive effect on the…
Q: Insurance companies track life expectancy information to assist in determining the cost of life…
A: Given,sample mean(x¯)=78.6standard deviation(s)=4.48population mean(μ)=77
Q: International public health practitioners have continuously attempted to point out differences in…
A: a) The test statistic = 0.403 = 60 At 0.05 significance level, the critical value is t0.05 =…
Q: When conducting a retrospective cohort study what are some possible selection and information bias…
A: The study is categorised into 2 Prospective cohort study Retrospective cohort study Prospective…
Q: a. State the null and research hypotheses. Identify the null and alternative hypotheses.
A: Given: Population proportion, π=0.39
Q: nsurance companies track life expectancy information to assist in determining the cost of life…
A:
Q: Consider the outcome of serum concentration vitamin D and the predictor cardiorespiratory fitness.…
A: Confounding Variables : A confounding variable is an “extra” variable that you didn’t account for.…
Q: A study showed that the alumni of a college who had grades that were close to the average tended to…
A: This does not mean that very good grades are a handicap for those seeking high incomes. Just because…
Q: Absenteeism can be a serious employment problem. It is estimated that absenteeism reduces potential…
A: Given information: The data represents the values of the variables Wage, Pct PT, Pct U, Av Shift,…
Q: Researchers wanted to conduct a study on the GPA of third year working engineering students in their…
A: As per the question, Researchers wants to identify if there is a significant difference on the GPA…
Q: Brainstorm and briefly describe three scenarios for which a quasi-experimental design would be…
A:
Q: A local teacher wants to see if teaching writing in different ways impacts student learning. She has…
A: Concept: According to the information given we will use Two sample independent T test for hypothesis…
Q: Fill in the missing values in the contingency table. F
A: We have to determine the expected cell frequency and cell contribution to Chi square test statistic.
Q: 51 42 43 Method 2 48 46 47 50 42 43 ANOVA table (to whole number, but p-value to 4 decimals and F…
A: Source SS df MS F p-value Factor A 3 1 3 0.3 0.6036 Factor B 54 2 27 2.7 0.1458 Interaction 2…
Q: Calie has just been named the director of alumni relationships at a local university. Alumni…
A: Given information: The data represents the values of specified characteristics of top 123 colleges…
Q: Answer the following to summarize the test of the hypothesis that there is no relationship between…
A: Chi square is the type of parametric test. There are three types of chi square test. It is based on…
Q: 3. In an area of the Midwest, records were kept on the relationship between the rainfall (in inches)…
A: With the increase in one variable if other variable is also increasing then there is a positive…
Q: insurance companies track life expectancy information to assist in determining the cost of life…
A: From the provided information, Average life expectancy of all policyholders, that is population mean…
If there is a significant interaction in a factorial design, why do researchers typically ignore (or minimize the importance of) the main effects?
Step by step
Solved in 2 steps
- Zeikia has just been named the director of alumni relationships at a local university. Alumni donations are an important source of revenue for colleges and universities. If administrators could determine the factors that could lead to increases in the percentage of alumni who make a donation, they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfied with their contact with teachers are more likely to graduate. As a result, one might suspect that smaller class sizes and lower student/faculty ration might lead to a higher percentage of satisfied graduates, which in turn might lead to increases in percentage of alumni who make a donation. Zeikia is feeling an extra pressure to increase total giving to the university because of recent budget cuts. Zeikia is also feeling pressured to increase the percentage of alumni to give. Zeikia found this new metric called average alumni giving rate U.S. News & World Report.…Why are interaction effects only associated with factorial designs? Examine the following data table and indicate the presence of (a) main effect of A, (b) main effect of B, (c) and interaction effect. Verify this with a graph. Factor B B1 B2 Factor A A1 10 5 A2 5 10The manager Concerned about her current customer base, manager Andersen started to think of factors that might affect the attractiveness of an auditing firm. Of course, the service quality provided and the fees charged by the auditor seem two important factors. Next, she decides that the reputation of the auditing firm also needs to be included in the framework as an independent variable. As illustrated by the dramatic effects of recent auditing scandals, reputation seems especially important for large auditors (i.e., auditing firms that are large in size). Finally, manager Andersen also thinks that the proximity of the auditing firm to the customer is another variable to be included as an independent variable. Proximity very likely affects the possibility for the client to personally meet with the auditors on a regular basis and she knows from her own contact with customers that they perceive personal interactions as quite important. Consider the above scenario shown; answer the…
- Calie has just been named the director of alumni relationships at a local university. Alumni donations are an important source of revenue for colleges and universities. If administrators could determine the factors that could lead to increases in the percentage of alumni who make a donation, they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfied with their contact with teachers are more likely to graduate. As a result, one might suspect that smaller class sizes and lower student/faculty ration might lead to a higher percentage of satisfied graduates, which in turn might lead to increases in percentage of alumni who make a donation. Calie is feeling an extra pressure to increase total giving to the university because of recent budget cuts. Calie is also feeling pressured to increase the percentage of alumni to give. Calie found this new metric called average alumni giving rate U.S. News & World Report.…Calie has just been named the director of alumni relationships at a local university. Alumni donations are an important source of revenue for colleges and universities. If administrators could determine the factors that could lead to increases in the percentage of alumni who make a donation, they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfied with their contact with teachers are more likely to graduate. As a result, one might suspect that smaller class sizes and lower student/faculty ration might lead to a higher percentage of satisfied graduates, which in turn might lead to increases in percentage of alumni who make a donation. Calie is feeling an extra pressure to increase total giving to the university because of recent budget cuts. Calie is also feeling pressured to increase the percentage of alumni to give. Calie found this new metric called average alumni giving rate U.S. News & World Report.…Calie has just been named the director of alumni relationships at a local university. Alumni donations are an important source of revenue for colleges and universities. If administrators could determine the factors that could lead to increases in the percentage of alumni who make a donation, they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfied with their contact with teachers are more likely to graduate. As a result, one might suspect that smaller class sizes and lower student/faculty ration might lead to a higher percentage of satisfied graduates, which in turn might lead to increases in percentage of alumni who make a donation. Calie is feeling an extra pressure to increase total giving to the university because of recent budget cuts. Calie is also feeling pressured to increase the percentage of alumni to give. Calie found this new metric called average alumni giving rate U.S. News & World Report.…
- Calie has just been named the director of alumni relationships at a local university. Alumni donations are an important source of revenue for colleges and universities. If administrators could determine the factors that could lead to increases in the percentage of alumni who make a donation, they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfied with their contact with teachers are more likely to graduate. As a result, one might suspect that smaller class sizes and lower student/faculty ration might lead to a higher percentage of satisfied graduates, which in turn might lead to increases in percentage of alumni who make a donation. Calie is feeling an extra pressure to increase total giving to the university because of recent budget cuts. Calie is also feeling pressured to increase the percentage of alumni to give. Calie found this new metric called average alumni giving rate U.S. News & World Report.…Is it possible to have several dependent variables in a model? Are several variables possible in a decision-making problem? Which model—descriptive, predictive, or prescriptive—of a particular choice issue would you be most likely to employ if it were offered to you? Why? Give an example of a well-known corporate, political, or military leader who made a choice that either had a positive or negative impact. What distinguishes a computer model from a spreadsheet model?In a two factor factorial design with two design factors A and B, why do we generally include the interaction term in the model? What is the major concern if the model ignores the interaction effect?
- Joseph Randal has just been named the director of alumni relationships at a local university. Alumni donations are an important source of revenue for colleges and universities. If administrators could determine the factors that could lead to increases in the percentage of alumni who make a donation, they might be able to implement policies that could lead to increased revenues. Research shows that students who are more satisfied with their contact with teachers are more likely to graduate. As a result, one might suspect that smaller class sizes and lower student/faculty ration might lead to a higher percentage of satisfied graduates, which in turn might lead to increases in percentage of alumni who make a donation. Joseph is feeling an extra pressure to increase total giving to the university because of recent budget cuts. Joseph is also feeling pressured to increase the percentage of alumni to give. Joseph found this new metric called average alumni giving rate U.S. News &…W. Thomas Boyce, a professor and pediatrician at the University of British Columbia, Vancouver, has studied interactions between individual differences in physiology and differences in experience in determining health and well-being. Dr. Boyce found that some children are more sensitive to their environments. They do exceptionally well when the environment is supportive but are much more likely to have mental and physical health problems when the environment has challenges. You decide to do a similar study, conducting a factorial experiment to test the effectiveness of one environmental factor and one physiological factor on a physical health outcome. As the environmental factor, you choose two levels of stressful life events. As the physiological factor, you choose three levels of immune reactivity. The outcome is number of respiratory illnesses in the previous 12 months, and the research participants are kindergartners.A study was conducted to assess the influence of various factors on the start of new firms in the computer chip industry. For a sample of 70 countries the following model was estimated: ŷ = -59.31 + 4.983x1 + 2.198x2 + 3.816x3 – 0.310x4 (1.156) (0.210) (2.063) (0.330) -0.886x5 + 3.215x6 + 0.85x7 (3.055) (1.568) (0.354) R2 = 0.766 where ŷ = new business starts in the industry X1 = population in millions X2 = industry size x3 = measure of economic quality of life measure of political quality of life measure of environmental quality of life measure of health and educational quality of life X4 X5 X6 = x7 = measure of social quality of life The numbers in parentheses under the coefficients are the estimated coefficient standard errors. (a) Determine which coefficients in the model are statistically significant? Provide a justification for your answer. (b) Is the overall regression equation statistically significant at the 1% level? Justify your answer.