Product was yielding 90% recover before the improvement. To determine if a 2% changes ( in either direction ) would be made at the 95% confidence interval, what sample size should be taken?
Use binomial formula:
n= (Z-squared) (p-bar) ( 1- pbar) / (Change in P) ^2
N= (1.96^2) ( 0.90) (0.10) / (0.02^2) = 864
Yield. It refers to the proportion of non-defective items among all manufactured goods, and is typically expressed as the difference between the numbers of non-defective items and manufactured goods. Yield is calculated as follows: (number of manufactured items / number of non-defective items).
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