IV. A researcher wanted to determine if the experimental group has a lower mean

Question

IV. A researcher wanted to determine if the experimental group has a lower mean the control group has at the = 0.09 level of significance? The data from the two groups are as the followings than 25. What type of test should be used in this research? A. One-sample t-test B. One-sample proportion z-test C. Two-sample Proportion z-test D. Two-independent sample z-test E. Two-independent sample t-test. 21 30. What should we do about the bypothese A. Reject the alternative hypothesis B. Cannot reject the null hypothesis C. Accept the null hypothesis D. Reject the null hypothesis. 31, At a = 0.09, what is the research 26. Is it a one-tailed or two-tailed test? A. There is insufficient evidence to conclade that the mean of the experimental grosp is A. Two-tailed B. Right-tailed C. Two-tailed and left-tailed D. Left-tailed E. Two-tailed and right-tailed. less than the mean of the control grou B. There is sufficient evidence to conclude that the mean of the control group is less than the mean of the experimental group C. There is insufficient evidence to conclude that the mean of the control group is not less than the mean of the experimental 27. What will be the research hypotheses? group D. There is sufficient evidence to conclude less than the mean of the control group 32, Compute the upper boundary of the 99% CI that the mean of the experimental group s valuein the research? for the estimated population mean difference A. -1.3524 B. -1.3480 C. -1.3460 D.-1.3448 E. -1.3441 A. 0.1687 B. 0.3065 C. 0.4777 D. 0.6904 E. 0.9546 . What is the test statistic in the research? B. -1.4706 D. 819

Explanation / Answer

25) As a result, none of the participants knew whether they were in the treatment groupor the control group. ... An independent t-test was used to determine whether there was a statistically significant difference

E option

26) left tailed

27) E option

28) E option

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