z
=
p
^
1
−
p
^
2
p
^
(
1
−
p
^
)
(
1
n
+
1
n
)
=
0.1089
−
0.0975
0.0988
(
1
−
0.988
)
(
1
744
+
1
3055
)
=
0.0114
0.0123
=
0.927
Description:
Math equation.