# Lab 5 - Greene, Kyle.docx - Factorial ANOVA u2013 Lab 5...

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Factorial ANOVA – Lab 5 QuestionsName: 1.Write a research question for a 2X2 factorial ANOVA with two levels for each independent variable. You need a minimum of 5 observations per group. Label the independent and dependent variables and label the groups. Define the target population and the sampling method employed to ensure a representative sample of the target population. 2.Write the main and interaction effects null hypotheses. List ANOVA assumptions for Factorial ANOVA. 3.Are there any significant main or interaction effects? Explain whether to reject or fail to reject your three null hypotheses based upon your a priori alpha level (critical test value). If you reject any null hypotheses, which groups scored higher? 4.For the interaction effect, as depicted in your table of “Between Subject Effects”, make a 2x2 table of cell means from your “Descriptives” table and explain what type of interaction you obtained. Do the row subtractions and give the row valuesand the signs to support your conclusions. 5.Is your design orthogonal? Explain orthogonality and its’ importance in the ANOVA procedure. What are the consequences of a nonorthogonal design?Research question: Is there a difference between two instructors (Stevens and Collins)and their method of instruction (powerpoint and no powerpoint instruction) on final examscores? Independent Variable 1:Teachers ‘Stevens and Collins’ both two ‘values’ in dataIndependent Variable 2:Methods being used or not used, ‘powerpoint instruction or not’, both with two ‘values’ in dataDependent Variable:Final exam scores that vary. Representative Sample: Five students in each of the four groups, 2 per teacher and instruction method.