Question 1053920
P(x <= 175)
Est = .23
Sample:  p = 175/800 = .219
{{{z =blue (x - mu)/sqrt(blue(p(1-p)/n))}}}
{{{z =blue (.219 - .23)/sqrt((blue(.23*.77)/800))}}}
Find z
P(x <= 175) = normalcdf(-100, z-value) -100 a placeholder