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homework_5_answers - PSC 103B Statistical Analysis of...

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PSC 103B Statistical Analysis of Psychological Data Homework #5 Due: 2/21/2008 1. For a 2 4 . ANOVA, answer the following questions: (2 points) a. Is it a one-way or two-way ANOVA? Two-way b. How many factors there? 2 c. How many levels for each factor? 2 levels for the first factor and 4 for the other d. How many cells in total? 2*4=8 2. Students often worry that the scheduled time of their final exam will affect their performance. You suspect that this might be true and that the effect would be greatest for more difficult exams. To test this, you conduct a 2 x 3 factorial ANOVA experiment in which difficulty level and time of testing are varied for a sample of 24 students who are taking final exams at different times. Using the data below, test whether performance depends on time of day and difficulty level of the exam. Higher scores indicate better performance. a. Fill in the table with all of the cell means. (2 points) 9am 12pm 3pm row means Hard 2.75 6.25 10 6.333 Easy 10 7.5 3.5 7 column means 6.375 6.875 6.75 6.667 Time of Testing 9:00am 12:00pm
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