Question 1195851
This is calculating a z-value which is here z=(phat-p)/sqrt (p*(1-p)/n)
=0.02/sqrt(0.93*0.07/500)

=0.02/0.0114
=1.75
Probability z > 1.75 is 0.0398
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Can check with a normal approximation
mean is 0.93*500=465
variance is that *0.07=32.55
sd is sqrt of that=5.71
95% of 500 is 475
so z=(475.5-465)/5.71, using the continuity correction factor
=1.84 and the probability of z> 1.84 is 0.0329.