Answer:
Given,
p1 = 0.05 , p2 = 0.01
alpha = 0.05
Here at 95% confidence level, z value is 1.96
sample size n = (z(alpha)*sqrt((p1+p2)(q1+q2)/2) + z(beta)*sqrt(p1q1+p2q2))^2 / (p1-p2)^2
substitute values
= (1.96*sqrt(0.05+0.01)(0.95+0.99)/2) + 1.28*sqrt(0.05*0.95+0.01*0.99))^2 / (0.05-0.01)^2
= 379.77
sample n = 380
Two different types of injection-molding machines are used to form plastic parts. A part is considered...
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