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psyc 274_midterm

# psyc 274_midterm - 7 The denominator of the t-test for...

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PSYC 274 (Spring 08 Midterm) 1. If a researcher conducts an experiment on one group of subjects who participate in both of two levels of an independent variable, and he wishes to conduct a statistical test to see if the means are different between the two different levels, he would use? a two sample t-test for related groups 2. The mean square for the treatment in a one-factor between subjects analysis of variance (MSa) is expected to reflect which of the following components if the null hypothesis is true ? sampling error 3. Violation of the assumptions behind the F-test are most likely to cause problems when? alpha is set at 0.01, and the number of participants in each group is unequal 4. What is NOT the assumptions of the F-test? equal numbers of subjects are assigned to each condition 5. The sampling distribution for the F-test? has a minimum value of 0, and a mode of 1.0 6. Post hoc multiple comparisons can be used? only if the overall or omnibus F-test is significant
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Unformatted text preview: 7. The denominator of the t-test for related scores is? the standard deviation of the difference between pairs of scores 8. The degrees of freedom for t-test for related scores is equal to? Nparis -1 9. Which of the following statistics provides a measure of the proportion of the variance in the dependent variable that can be predicted from the independent variable? Eta square 10. Type I error? is the probability that the null hypothesis will be rejected when it is true 11. The standard error of the difference between two means? is the standard deviation of the difference between two sample means 12. The degrees of freedom of a test statistic indicate? the number of pieces of information that were free to vary in computing a test statistic 13. Confounding occurs in an experiment? when a extraneous variable can explain differences between experimental groups...
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