Question 475616
H[o]: site two missed the production goal fewer times than site one.
Site #1: p=11/80=.1375, q=1-.1375=.8625, n=80
Site #2: p=10/92=.1087, q=1-.1087=.8913, n=92
{{{sigma=sqrt((.1375*.8625)/80+(.1087*.8913)/92)}}}=.0385+.0325=.071
z=(.1375-.1087)/.071=.4056
Using a single tailed test z=.4056 has an area of .3245 under the normal curve and the null hypothesis is not confirmed.
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Ed