A researcher performed a two-sample independent groups t-test and obtained a calculated value of t =...
A researcher performed a two-sample independent groups t-test and obtained a calculated value of t = 0. This is a valid result.
true or false?
Homework Answers
Calculated value of t is zero.. this is an valid result...
Above statement is true.. because as the test is considered, difference in in the sample means of two different samples can be zero it will give the value of t calculated zero whatever the denominator is...
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A researcher performed a two-sample independent groups t-test
and obtained a calculated value of t =...
A two–independent sample t-test is computed when mean differences are compared between two or more groups...
A two–independent sample t-test is computed when mean differences are compared between two or more groups sampled from a population with an unknown variance. Question 2 options: True or False
QUESTION 11 You run an independent samples t-test between two groups, and find a t-statistic of...
QUESTION 11 You run an independent samples t-test between two groups, and find a t-statistic of t=1.67. Is this sufficient to reject the null hypothesis? Assume α=0.05 and a one-sided test. Yes, > 1.67 is sufficient to reject the null. No, > 1.67 is not sufficient to reject the null. Not enough information. 2 points QUESTION 12 In a dependent samples t-test, the sample sizes must be equal. True False 2 points QUESTION 13 In an independent samples...
An ANOVA comparing two groups is equivalent to an independent samples t-test. True False
An ANOVA comparing two groups is equivalent to an independent samples t-test. True False
If a researcher reported for an independent-groups t test that t(12) = 3.66, p < .01,...
If a researcher reported for an independent-groups t test that t(12) = 3.66, p < .01, how many subjects were there in the study?
11. What is the null hypothesis for a t-test for two independent groups? a. If mul...
11. What is the null hypothesis for a t-test for two independent groups? a. If mul and mu2 are the population means of the two groups, then the null hypothesis is Ho: mul-mu2=0. b. If sl and s2 are the population standard deviations of the two groups, then the null hypothesis is Ho: sl-s2=0. 12. Differentiate between a data set that should be analyzed using a paired t-test from a data set that should be analyzed using a t-test for...
PLEASE help ?? A researcher conducted a single sample t-test on results of an experiment with...
PLEASE help ??
A researcher conducted a single sample t-test on results of an experiment with n = 18 participants and the computed t = -2.28. What is the correct conclusion from this experiment if p < 0.05, 2-tails test is used for hypothesis testing? O A. The researcher failed to reject the null hypothesis and concluded that there is a significant treatment effect. O B. The researcher rejected the null hypothesis and concluded that there is a significant treatment...
A researcher conducts a study in which the population variance of difference scores between two groups...
A researcher conducts a study in which the population variance of difference scores between two groups is unknown. What type of t-test is most appropriate for this study? Question 6 options: one–independent sample t-test two–independent sample t-test related samples t-test There is not enough information to answer this question.
Question 12 2 pts If a researcher reports a “statistically significant difference” between two groups after...
Question 12 2 pts If a researcher reports a “statistically significant difference” between two groups after conducting an independent-samples t test, this implies that: Cohen's d is at least 0.50. the difference between the two groups is unlikely to have occurred by chance if the null hypothesis is true. the difference between the two groups is unlikely to have occurred by chance if the null hypothesis is false. there is a large difference between the two groups.
QUESTION 1 If a t-test is performed in the context of a multiple regression model and...
QUESTION 1 If a t-test is performed in the context of a multiple regression model and the null hypothesis cannot be rejected, this means that A. the independent variable for which the test has been performed has a significant relationship with the dependent variable. B. the independent variable for which the test has been performed has no significant relationship with the dependent variable. C. all independent variables have a significant relationship with the dependent variable. D. no independent variable has...
Standard error for the independent measures t test relies on pooled variance taken by adding the...
Standard error for the independent measures t test relies on pooled variance taken by adding the sum of squares from the two sample groups together True False
11. What is the null hypothesis for a t-test for two independent groups? a. If mul and mu2 are the population means of the two groups, then the null hypothesis is Ho: mul-mu2=0. b. If sl and s2 are the population standard deviations of the two groups, then the null hypothesis is Ho: sl-s2=0. 12. Differentiate between a data set that should be analyzed using a paired t-test from a data set that should be analyzed using a t-test for...
PLEASE help ??
A researcher conducted a single sample t-test on results of an experiment with n = 18 participants and the computed t = -2.28. What is the correct conclusion from this experiment if p < 0.05, 2-tails test is used for hypothesis testing? O A. The researcher failed to reject the null hypothesis and concluded that there is a significant treatment effect. O B. The researcher rejected the null hypothesis and concluded that there is a significant treatment...
Question 12 2 pts If a researcher reports a “statistically significant difference” between two groups after conducting an independent-samples t test, this implies that: Cohen's d is at least 0.50. the difference between the two groups is unlikely to have occurred by chance if the null hypothesis is true. the difference between the two groups is unlikely to have occurred by chance if the null hypothesis is false. there is a large difference between the two groups.
QUESTION 1 If a t-test is performed in the context of a multiple regression model and the null hypothesis cannot be rejected, this means that A. the independent variable for which the test has been performed has a significant relationship with the dependent variable. B. the independent variable for which the test has been performed has no significant relationship with the dependent variable. C. all independent variables have a significant relationship with the dependent variable. D. no independent variable has...
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