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Table 4 Group Statistics and Independent Samples Test for both vehicles on Road 3
From: Evaluating impact of demerit points system on speeding behavior of drivers
Group Statistics | Levene’s Test for Equality of Variances | t-test for Equality of Means | Std. Error Difference | 95% Confidence Interval of the Difference | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
F | Sig. | t | df | Sig. (2-tailed) | Mean Difference | |||||||||
Factors | N | Mean | Std. Deviation | Std. Error Mean | Lower | Upper | Lower | Upper | Lower | Upper | Lower | Upper | Lower | |
Before | 795 | 72.14 | 11.73 | 0.42 | Equal variances assumed | 2.72 | 0.10 | −1.16 | 1349.00 | 0.25 | −0.79 | 0.68 | −2.12 | 0.54 |
After | 556 | 72.93 | 12.99 | 0.55 | Equal variances not assumed | −1.14 | 1114.87 | 0.25 | −0.79 | 0.69 | −2.14 | 0.57 | ||