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

1.645

1.960

0.0001

0.0001

(0.0237, 0.0243)

(0.0237, 0.0243)

With pooled variance

116.701

1.645

1.960

0.0001

0.0001

(0.0237, 0.0243)

(0.0237, 0.0243)

NDC

No-pooled variance

−139.463

1.645

1.960

0.0001

0.0001

(−0.029, −0.028)

(−0.029, −0.028)

With pooled variance

−139.339

1.645

1.960

0.0001

0.0001

(−0.029, −0.028)

(−0.029, −0.028)

Gap between NPP & NDC

No-pooled variance

507.707

1.645

1.960

0.0001

0.0001

(0.052, 0.053)

(0.052, 0.053)

With pooled variance

524.285

1.645

1.960

0.0001

0.0001

(0.052, 0.053)

(0.052, 0.053)