Question
A researcher conducts a one-tailed t -test of paired samples, using a pre-test and post-test to analyze the learning of a group of students after
A researcher conducts a one-tailed t-test of paired samples, using a pre-test and post-test to analyze the learning of a group of students after an instructional program is implemented. The level of significance is set to alpha = .05. The null hypothesis states that the means of the pre-test and post-test scores are equal, while the alternate hypothesis states that the mean of the post-test scores are greater than the mean of the pre-test scores. What is the result of the research if the t-test reveals a p-level of .03?
| A. | The research is inconclusive and the test should be repeated. | |
| B. | The null hypothesis is rejected since the p-level of .03 is less than .05. The researcher concludes that the mean of the post-test scores is greater than the mean of the pre-test scores. | |
| C. | The researcher fails to reject the null hypothesis since the p-level of .03 is less than .05. The researcher concludes that the mean of the post-test scores is less than the mean of the pre-test scores. | |
| D. | The researcher fails to reject the null hypothesis since the p-level of .03 is less than .05. The researcher concludes that the mean of the pre-test scores is equal to the mean of the pos-test scores. |
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Elements Of Chemical Reaction Engineering
Authors: H. Fogler
6th Edition
013548622X, 978-0135486221
