Researchers report that university students who are on Twitter or have it running in the background) while studying had lower grades than students who did not use the social network. A researcher would like to know if the same result extends to students in lower grade levels. The researcher planned a two-factor study comparing Twitter users with non-users for primary school students, high school students, and university students. For consistency across groups, grades were converted into six categories, numbered 0–5 from low to high. The results are presented in the following matrix. Use a two factor ANOVA with α =.05 to evaluate the mean differences and answer the following questions: Q.5.1. What are the dependent and independent variables in this study? Q.5.2. State the alternate hypotheses for this test. Q.5.3. What were the assumptions for this statistical test and were they met?
Researchers report that university students who are on Twitter or have it running in the background) while studying had lower grades than students who did not use the social network. A researcher would like to know if the same result extends to students in lower grade levels. The researcher planned a two-factor study comparing Twitter users with non-users for primary school students, high school students, and university students. For consistency across groups, grades were converted into six categories, numbered 0–5 from low to high. The results are presented in the following matrix.
Use a two factor ANOVA with α =.05 to evaluate the mean differences and answer the following questions:
Q.5.1.
What are the dependent and independent variables in this study?
Q.5.2.
State the alternate hypotheses for this test.
Q.5.3.
What were the assumptions for this statistical test and were they met?
Q.5.4.
Does using twitter have an influence on student’s grades across all ages? Were there any significant mean differences? Explain your decisions. (provide your output)
Q.5.5.
Calculate η2 to measure the effect size of the treatment conditions.
Q.5.6.
Write a few sentences demonstrating how a research report would present the results of the hypothesis test and the measure(s) of effect size.
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