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A student's t-test was used to compare mean responses between individual experimental and control groups.
Independent-samples Student's t test was performed to compare mean responses between two groups.
For each effector system, two-tailed paired t-tests were used to compare the mean responses between trials 1 and 2 and between trial 1 and 8 for habituaters and between trials 2 and 3 for sensitizers.
Mean responses between premed and non premed students were compared for each of the following seven constructs related to science research that emerged from the pilot questionnaire: beliefs, attitudes, social influences, intrinsic motivation, extrinsic motivation, self-efficacy, and accessibility.
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In addition, paired comparisons reveal statistically significant per-item differences in mean response between evolution and creationism (Student's t-test, p < 0.01 for each item).
We then calculated the peak response in a window from +200 to +800 ms after valve opening, subtracting a baseline value of the mean response between −1000 to 0 ms.
Independent samples t-test indicated statistically significant differences in the mean response between the two groups for statement 6 on the questionnaire, "The steps in the teaching method were presented in a clear fashion and were easy to understand".
Continuous outcome variables will be analysed using a similar method with differences in the mean response between the FHQ and control groups being compared using a weighted paired t-test.
A two-sided t-test indicated that our estimate and Cummings' estimate are significantly different (p = 0.02), confirming a small decrease in the mean response between 1986-1995 and 1996-2005.
Statistically significant difference was found in the mean response between the two groups for statement 6 on the questionnaire, "The steps in the teaching method were presented in a clear fashion and were easy to understand".
23 24 25 26 For continuous data we used the standard paired t test (k−1=5 degrees of freedom) to the differences in the mean response between the intervention and control site pairs.
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