Question 1181011
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x = number of successes = 76
n = number of subjects = sample size = 100


p = hypothesized population proportion 
p = 0.71
phat = sample proportion
phat = x/n
phat = 76/100
phat = 0.76


SE = standard error
SE = sqrt(p*(1-p)/n)
SE = sqrt(0.71*(1-0.71)/100)
SE = 0.04537620521816
The value is approximate.


z = test statistic
z = (phat - p)/SE
z = (0.76 - 0.71)/0.04537620521816
z = 0.05/0.04537620521816
z = 1.101899106803
z = 1.10


Answer:  z = 1.10
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