User:Globber

$\hat p_1\ =.65$

$n_1 =4066\,\!$

$\hat p_2\ =.43$

$n_2 =3315\,\!$

$\hat p\ =.54$

$\alpha\ =.01$

$z= \frac{\hat p_1-\hat p_2}{\sqrt{\hat p\hat q (\frac{1}{n_1}+\frac{1}{n_2})}}$

$z= \frac{.65-.43}{\sqrt{.54\times.46 (\frac{1}{4006}+\frac{1}{3315})}}$