Table 2. Comparison of the surface roughness among different groups.
| Reading | Solution | N | Mean | Std. deviation | Analysis of variance (ANOVA) p-value | 95% confidence interval for mean | Tukey as multiple comparison test | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Lower bound | Upper bound | CONTROL | PEPSI | MIRINDA | ||||||
| Baseline | CONTROL | 12 | 1.097 | 0.246 | 0.634 | 0.941 | 1.253 | 1 | ||
| PEPSI | 12 | 1.187 | 0.260 | 1.021 | 1.352 | NS | 1 | |||
| MIRINDA | 12 | 1.187 | 0.255 | 1.025 | 1.349 | NS | NS | 1 | ||
| Reading 2 | CONTROL | 12 | 1.339 | 0.209 | 0.000 | 1.206 | 1.472 | 1 | ||
| PEPSI | 12 | 1.580 | 0.249 | 1.422 | 1.738 | 0.085 | 1 | |||
| MIRINDA | 12 | 1.907 | 0.330 | 1.697 | 2.116 | 0.000 | 0.014 | 1 | ||
| Reading 3 | CONTROL | 12 | 1.172 | 0.425 | 0.000 | 0.902 | 1.442 | 1 | ||
| PEPSI | 12 | 1.987 | 0.832 | 1.459 | 2.516 | 0.021 | 1 | |||
| MIRINDA | 12 | 2.559 | 0.788 | 2.059 | 3.060 | 0.000 | 0.139 | 1 | ||