You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly different from 0.81.
With H1 : p
≠
≠
0.81 you obtain a test statistic of
z
=
3.193
z
=
3.193
.
Use a normal distribution calculator and the test statistic to find the P-value accurate to 4 decimal places. It may be left-tailed, right-tailed, or 2-tailed.