one - Sample proportion test

sample size 1200

successes 675

proportion 0.56250

null hypothesis: P = 0.54

Alternative Hyp: P > 0.54

Difference 0.02250

Standard Error 0.01432

Test Statistic Z = 1.56

95% confidence Interval

(0.53443, 0.59057)

again, I'm trying to figure out exactly how to find the p-value. I didn't think it was to difficult, I'm just having a brain meltdown for some reason. Also, what does the p-value represent?

thanks all