Homework Answers
3)The assumption of independent sample t test is Homogeneity of variance.
4)Pooled Variance
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rowan.instructure.com Question 3 0.5 pts Which of the following are assumptions of the independent samples t-test?...
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...
QUESTION 12 Using the SPSS output below, which of the following statements is correct? Independent Samples...
QUESTION 12 Using the SPSS output below, which of the following statements is correct? Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Confidence Interval of the Difference Mean F Sig t df Sig. (2- tailed) Std. Error Difference Difference Lower Upper Equal variances assumed 1.429 280 2.145 10 058 6.00000 2.79682 - 23171 12.23171 Equal variances not 2.145 0.461 050 6.00000 2.79082 - 28015 12.28015 assumed The assumption of homogeneity of variance was...
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...
Which of the following is the error term (denominator) used to compute a t-value in an...
Which of the following is the error term (denominator) used to compute a t-value in an independent samples t-test. Standard error of mean computed based on population standard deviation Standard error of mean difference computed based on standard deviation of mean difference between the two sets of associated scores Standard error of mean computed based on pooled standard deviation of the two samples Standard error of mean computed based on sample standard deviation Any research question that can be answered...
1. When do we use an independent groups t-test? a. b. c. d. When we are...
1. When do we use an independent groups t-test? a. b. c. d. When we are comparing means from one sample that has been measured twice. When we are comparing means from two different samples. When we are comparing a sample mean to a population mean. When we are comparing two population means. 2. Which of the following is true regarding the use of t-tests for true experiments versus quasi-experimental designs? a. b. We use the same t-test whether it...
Question 16 (1 point) A t-test equation can be used to estimate sample size and power? O 1) True ...
Question 16 (1 point) A t-test equation can be used to estimate sample size and power? O 1) True O 2) False Save Question 17 (1 point) The standard error the mean is not used in independent t tests? O 1) True O 2) False Save Question 18 (1 point) Before you determine the p-value of an independent t test you should first determine if the variances are equal. You havea greater chance of rejecting the null if the variances...
when variances between two samples are not equal in a paired sample t test, the pooled...
when variances between two samples are not equal in a paired sample t test, the pooled variance must be computed and used 8n place of the estimated standard error. t or f
10. In an independent-samples t test, the ________ is used rather than the ________. Select one:...
10. In an independent-samples t test, the ________ is used rather than the ________. Select one: A. standard deviation; pooled variance B. variance; pooled variance C. pooled variance; standard deviation D. standard deviation; variance 11. Dr. Jameson wanted to know if IQ scores differed between male and female participants in his study. He gave 28 participants an IQ test and then compared IQ scores for gender differences. He hypothesized that there would be a statistically significant gender difference in IQ...
In "Small Independent samples about Population Mean" case, we usually assume the variances from the two...
In "Small Independent samples about Population Mean" case, we usually assume the variances from the two samples are "Equal" in scales. Therefore, we use the smaller standard deviation (or variance) found from the two samples to calculate the test statistic. use the larger standard deviation (or variance) found from the two samples to calculate the test statistic. calculate the average the two standard deviations (or variances) and use it to calculate the test statistic. calculate the pooled standard deviation (or...
uunt lailieu or à two-tailed Question 4 (1 point) When variances between two samples are not...
uunt lailieu or à two-tailed Question 4 (1 point) When variances between two samples are not equal in an independent-sample t- test, the pooled variance must be computed and used in place of the estimated standard error. a) True b) False
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...
QUESTION 12 Using the SPSS output below, which of the following statements is correct? Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Confidence Interval of the Difference Mean F Sig t df Sig. (2- tailed) Std. Error Difference Difference Lower Upper Equal variances assumed 1.429 280 2.145 10 058 6.00000 2.79682 - 23171 12.23171 Equal variances not 2.145 0.461 050 6.00000 2.79082 - 28015 12.28015 assumed The assumption of homogeneity of variance was...
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. When do we use an independent groups t-test? a. b. c. d. When we are comparing means from one sample that has been measured twice. When we are comparing means from two different samples. When we are comparing a sample mean to a population mean. When we are comparing two population means. 2. Which of the following is true regarding the use of t-tests for true experiments versus quasi-experimental designs? a. b. We use the same t-test whether it...
Question 16 (1 point) A t-test equation can be used to estimate sample size and power? O 1) True O 2) False Save Question 17 (1 point) The standard error the mean is not used in independent t tests? O 1) True O 2) False Save Question 18 (1 point) Before you determine the p-value of an independent t test you should first determine if the variances are equal. You havea greater chance of rejecting the null if the variances...
In "Small Independent samples about Population Mean" case, we usually assume the variances from the two samples are "Equal" in scales. Therefore, we use the smaller standard deviation (or variance) found from the two samples to calculate the test statistic. use the larger standard deviation (or variance) found from the two samples to calculate the test statistic. calculate the average the two standard deviations (or variances) and use it to calculate the test statistic. calculate the pooled standard deviation (or...
uunt lailieu or à two-tailed Question 4 (1 point) When variances between two samples are not equal in an independent-sample t- test, the pooled variance must be computed and used in place of the estimated standard error. a) True b) False
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