z
=
p
^
1
−
p
^
2
p
^
(
1
−
p
^
)
(
1
n
1
+
1
n
2
)
=
0.46
−
0.22
0.34
(
1
−
0.34
)
(
1
50
+
1
50
)
=
0.24
0.095
=
2.526
Description:
Math equation.