to reject the null hypothesis in a single sample t-test your observed value of m
ID: 3228000 • Letter: T
Question
to reject the null hypothesis in a single sample t-test your observed value of must a. equal the critical value of t b. exceed the critical value of t c. be less than the critical value of t d. be equal to zero What critical value of t should be used when we have 20 people in a sample, and we conduct a nondirectional test at a = .05. a. 2, 093 b. 2, 086 c. 1, 729 d. 1, 725 If a researcher uses an independent (between groups) design, and her degrees of freedom are 18, how many participants were there in total? a. 40 b. 19 c. 18 d. 20 A medical researcher would like to compare reaction times of a sample of smokers and a sample of non-smokers. Which statistical test should he use? a. standard deviation test b. z statistic c. independent samples t-test d. single sample t-test If you want to determine whether the variances of the two groups in an independent samples t-test arc equivalent, you should check a. the mean difference from the SPSS output b. the Sig. column in the SPSS output c. Levene's Test for Equality of Means d. t-test for Equality of Means To determine whether there is a significant difference between two groups that are matched on a variable or set of variables, which statistical test is used? a. matched-samples t-test b. single-sample t - testExplanation / Answer
11)
Answer: C
That is, independent sample’s t test.
Since the two samples are independent.
12)
Answer: C
That is, Leven’s test for equality of means.
13)
Answer: A
That is, matched-samples t test.
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