Homework Answers
Cohen's d
= (Mean difference between two groups) / (Pooled Standard Deviation)
= (20 - 17) / 
= 3/3
Option D is correct.
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An independent-measures study produces sample means of M1 = 20 and M2 = 17, and a...
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose sy...
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose symbol is )? O The variance across all the data values when both samples are pooled together O A weighted average of the two sample variances (weighted by the sample sizes) O The difference between the standard deviations of the two samples O An estimate of the standard distance between the difference in sample means (M, - M2) and the difference...
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An independent-measures research study with n=5 participants in each treatment produces sample variances of 8 and 10, and a 2-point difference between the two treatment means (i.e.,M - M2=2). Given this information, what is the value of Cohen's d? 2/2 2/3 ООО 6 219 2/18
For the independent measures ttast, which of the following describes the estimated standard error of the...
For the independent measures ttast, which of the following describes the estimated standard error of the difference in sample means (whose symbolis )? The difference between the standard deviations of the two samples A weighted average of the two sample variances (weighted by the sample stres) An estimate of the standard distance between the difference in sample means (M. - Me) and the difference in the corresponding population means (Hi-Pa) The variance across all the data values when both samples...
1. You have an independent-measures study where your first sample has an SS = 36 and...
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To An independent-measures t hypothesis test is appropriate when the value for a is known a....
To An independent-measures t hypothesis test is appropriate when the value for a is known a. b. the mean for a treated group of subjects is compared to a known population mean C. one sample is used to test a hypothesis about one population P there are two separate samples containing different subjects 17. One sample of n 5 scores has a variance of s 10 and a second sample of n= 10 scores has s pooled variance is computed...
19. The data from an independent-measures research study produce a sample mean difference of 4 points...
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The null hypothesis for the independent-measures t-test states _____ A) M1 - M2 = 0 B)...
The null hypothesis for the independent-measures t-test states _____ A) M1 - M2 = 0 B) μ1 - μ2 ≠ 0 C) μ1 - μ2 = 0 D) M1 - M2 ≠ 0
Calculate the pooled variance (as in an independent-Measures t test for the following sample. Round to...
Calculate the pooled variance (as in an independent-Measures t test for the following sample. Round to two decimal places. Treatment Treatment A B 12 8 8 9 12 15 16 17 4 5 17 18 17 13 6 3
We have two independent populations A and B, with means Hi and M2 and variances o...
We have two independent populations A and B, with means Hi and M2 and variances o and ož, respectively. Parameter of interest is difference 0 = M1 – M2. To estimate the difference , we use ô = X - Y, where X and Y are the sample means from the respective populations, based on samples of sizes ni, n2, respectively. Which of the following statements is true? A. E[0] = 0 and Var[@] = o/nı + o2/n2 B. ECO]...
An independent-measures study comparing two treatment conditions produces a t statistic with df = 18. If...
An independent-measures study comparing two treatment conditions produces a t statistic with df = 18. If the two samples are the same size, how many participants were in each of the samples? a) 9 b) 10 c) 19 d) 20
For the independent-measures t test, which of the following describes the estimated standard error of M1 - M2 (whose symbol is )? O The variance across all the data values when both samples are pooled together O A weighted average of the two sample variances (weighted by the sample sizes) O The difference between the standard deviations of the two samples O An estimate of the standard distance between the difference in sample means (M, - M2) and the difference...
An independent-measures research study with n=5 participants in each treatment produces sample variances of 8 and 10, and a 2-point difference between the two treatment means (i.e.,M - M2=2). Given this information, what is the value of Cohen's d? 2/2 2/3 ООО 6 219 2/18
For the independent measures ttast, which of the following describes the estimated standard error of the difference in sample means (whose symbolis )? The difference between the standard deviations of the two samples A weighted average of the two sample variances (weighted by the sample stres) An estimate of the standard distance between the difference in sample means (M. - Me) and the difference in the corresponding population means (Hi-Pa) The variance across all the data values when both samples...
To An independent-measures t hypothesis test is appropriate when the value for a is known a. b. the mean for a treated group of subjects is compared to a known population mean C. one sample is used to test a hypothesis about one population P there are two separate samples containing different subjects 17. One sample of n 5 scores has a variance of s 10 and a second sample of n= 10 scores has s pooled variance is computed...
19. The data from an independent-measures research study produce a sample mean difference of 4 points and a pooled variance of 16. If there are n 8 scores in each sample, then what is the estimated standard error for the sample mean difference? c. 16 d. 128 a. b. 4
Calculate the pooled variance (as in an independent-Measures t test for the following sample. Round to two decimal places. Treatment Treatment A B 12 8 8 9 12 15 16 17 4 5 17 18 17 13 6 3
We have two independent populations A and B, with means Hi and M2 and variances o and ož, respectively. Parameter of interest is difference 0 = M1 – M2. To estimate the difference , we use ô = X - Y, where X and Y are the sample means from the respective populations, based on samples of sizes ni, n2, respectively. Which of the following statements is true? A. E[0] = 0 and Var[@] = o/nı + o2/n2 B. ECO]...
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