assignment-4-2 - STA 3024 Assignment 4: Form 2 A class was...

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STA 3024 Assignment 4: Form 2 A class was given an exam for which there were five different forms (A, B, C, D, E). Each form consisted of the same questions in a varying order. We want to investigate whether the forms were all equally difficult, or whether the order of the questions somehow affected the difficulty. The data for the class is shown below. (Each student took exactly one form.) Form A Form B Form C Form D Form E Overall Number of Students 56 56 56 55 55 278 Mean 85.5 87.2 84.0 84.0 86.7 85.5 Standard Deviation 13.4 12.5 14.3 14.8 12.2 13.4 1. Suppose we want to analyze the data using one-way ANOVA. Our explanatory variable will be exam form (A, B, C, D, E), and our response variable will be exam grade on a 0–100 scale. If we had instead recorded exam grade simply on a pass/fail scale, would we still be able to analyze the data using one-way ANOVA? If so, explain how. If not, state what methods should be used instead. 2. (a) Calculate the values of
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This note was uploaded on 12/15/2011 for the course STA 3024 taught by Professor Ta during the Spring '08 term at University of Florida.

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assignment-4-2 - STA 3024 Assignment 4: Form 2 A class was...

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