| Political Party | Type | Z Value | Z Critical Value | P-value | Confidence Interval | |||
| α |
|
| 0.1 | 0.05 | 0.1 | 0.05 | 0.1 | 0.05 |
| NPP | No-pooled variance | 116.762 |
−1.282 |
−1.645 |
1.000 |
1.000 | (−1.000, 0.0243) | (−1.000, 0.0243) |
| With pooled variance | 116.701 | −1.282 | −1.645 | 1.000 | 1.000 | (−1.000, 0.0243) | (−1.000, 0.0243) | |
| NDC | No-pooled variance | −139.463 | −1.282 | −1.645 | 0.0001 | 0.0001 | (−1.000, −0.028) | (−1.000, −0.028) |
| With pooled variance | −139.339 | −1.282 | −1.645 | 0.0001 | 0.0001 | (−1.000, −0.028) | (−1.000, −0.028) | |
| Gap between NPP & NDC | No-pooled variance | 507.707 | −1.282 | −1.645 | 1.000 | 1.000 | (−1.000, 0.053) | (−1.000, 0.053) |
| With pooled variance | 524.285 | −1.282 | −1.645 | 1.000 | 1.000 | (−1.000, 0.053) | (−1.000, 0.053) | |