A professor wants to determine if there is a difference betweenstudents' pre and post test after a semester of learning.
1. What could be the research question for this problem?
2. What could be the null hypothesis and alternative hypothesisfor this problem?
3. Looking at the mean of both pro and post test, on theend-results below, does it REJECT or FAIL TO REJECT the nullhypothesis and why?
The results of the test showed this following:
Paired SamplesStatistics |
| Mean | N | Std. Deviation | Std. Error Mean |
Pair 1 | PreTest | 65.0000 | 33 | 15.18223 | 2.64289 |
PostTest | 71.4545 | 33 | 14.59686 | 2.54099 |
Paired SamplesCorrelations |
| N | Correlation | Sig. |
Pair 1 | PreTest &PostTest | 33 | .969 | .000 |
| | | | |
Paired SamplesTest |
| Paired Differences | t | df | Sig. (2-tailed) |
Mean | Std. Deviation | Std. Error Mean | 95% ConfidenceInterval of the Difference |
Lower | Upper |
Pair 1 | PreTest - PostTest | -6.45455 | 3.73406 | .65002 | -7.77858 | -5.13051 | -9.930 | 32 | .000 |
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