Assignment: Answer the following multiple choice: 1. One sample with n = 8 and a second sample with n = 10 will produce an independent-measures t statistic with df = 9. True or False 2. A researcher reports t(24) = 5.30 for an independent-measures experiment. How many individuals participated in the entire experiment? (Points: 1) a. 24 b. 25 c. 26 d. 12 3. One sample of n = 5 scores has SS = 36. A second sample of n = 7 scores has SS = 64. What is the value of the pooled variance for these two samples? a. 100/12 b. 100/10 c. 36/5 + 64/7 d. 36/4 + 64/6 4. The data from an independent-measures research study produce a sample mean difference of 4 points and a pooled variance of 12. If there are n = 6 scores in each sample, then the estimated standard error for the mean difference is _____. (Points: 1) a. 2 b. 4 c. 12 d. 120 5. Two samples, each with n = 10 scores, are selected from the same population. If the variance for the first sample is s2 = 40 and the variance for the second sample is s2 = 50, then how much difference should be expected, on average, between the two sample means? (Points: 1) a. 90 points b. 45 points c. 3 points d. impossible to determine without additional information 6. The numerator of the repeated-measures t formula measures how much difference there is between the sample mean and the hypothesized population mean. True False 7. Compared to independent-measures designs, repeated-measures studies reduce the variance by removing individual differences. (Points: 1) True False 8. In general, an increase in variance for the sample of difference scores will cause _____. a. an increase in the standard error and an increase in the value of t b. an increase in the standard error and a decrease in the value of t c. a decrease in the standard error and an increase in the value of t d. a decrease in the standard error and a decrease in the value of t 9. With a= .05 and a sample of n = 15 participants in a repeated-measures study comparing two treatments, what are the t statistic boundaries for the two-tailed critical region? (Points: 1) a. t = ?2.145 b. t = ?1.761 c. t = ?1.746 d. t = ?2.120 10. If a repeated-measures study shows a significant difference between two treatments with a = .01, then you can be sure that _____. a. the value of Cohen?s d is large. b. the percentage of variance explained (r2) is large c. both Cohen?s d and r2 are large c. A significant effect does not necessarily mean that the effect size will be large.
Paper#13576 | Written in 18-Jul-2015Price : $25