Assignment #5 ayout References Mailings Review View No Spacing Heading 1 Heading

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Assignment #5 ayout References Mailings Review View No Spacing Heading 1 Heading 1. The null hypothesis for the independent-measures t test states a. there is no difference between the two sample means b. there is no difference between the two population means c. the difference between the two sample means is identical to the difference betweern the two population means d. None of the 3 choices is correct 2. As the sample variance increases, the value of the t statistic a. increases (moves away from zero) b. decreases (moves toward zero) c. approximates the value of M-M d. the value of t is not influenced by sample variance An independent-measures research study uses two samples, each with ns 12, to compare two treatments. if the results are evaluated with a t statistic using a one-tailed test with .01, then the critical region would have a boundary of a, t= 2.797 b. t 2.492 c t 2.819 d. t+ 2.508 4. A researcher conducts an experiment comparing two treatment conditions and obtains 20 scores in each treatment. Which design would require the smallest number of subjects? a. a repeated-measures design b. an independent-measures design c. a matched-subjects design d. either an independent-measures or a matched-subjects design A researcher conducts a repeated-measures study comparing two treatment conditions with a sample of na 25 participants and obtains a t statistic of following is the correct decision about the null hypothesis? 2.21, which of the a. Reject the null hypothesis with = .0S but fail to reject with -.01 b. Reject the null hypothesis with either ,05 or = .01. c. Fail to reject the null hypothesis with either ,05 or .01 English (US) Focus 0 44 11 F3

Explanation / Answer

Option B

Since the null hypothesis always contains the "=", the answer will be from A and B.
which is µ1-µ2 =0.

As The null hypothesis for the independent t-test is that the population means from the two unrelated groups are equal:

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