An Open Access Journal
Table 2 Group Statistics and Independent Samples Test for both vehicles on Road 1
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 | 471 | 82.26 | 16.94 | 0.78 | Equal variances assumed | 0.09 | 0.76 | 0.19 | 856.00 | 0.85 | 0.22 | 1.13 | −2.01 | 2.44 |
After | 387 | 82.04 | 15.97 | 0.81 | Equal variances not assumed | 0.19 | 839.99 | 0.85 | 0.22 | 1.13 | −1.99 | 2.43 | ||