Homework Answers
Solution:- Given that limits (0.45,0.75)
p = (upper + lower)/2 = (0.75+0.45)/2 = 0.6
E = (upper - lower)/2 = (0.75-0.45)/2 = 0.15
95% confidence interval for Z = 1.96
sample n = (Z/E)^2*p*q = (1.96/0.15)^2*0.6*0.4 = 40.977 = 41
n = 41
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