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(Solved): The quality assurance department at a certain company wants to ensure that at least 90% of a product ...
The quality assurance department at a certain company wants to ensure that at least 90% of a product is free of a certain defect. To that end, they consider the following
problem:
A certain batch of 50 units of the product is 90% free from the defect, so there are 45 normal units and 5 defective units in the batch. What is the lowest whole number sample
size n of the 50 units that would need to be taken so that the probability of all n units being normal (non-defective) is less than 5% ?
Enter the lowest whole number n such that P(x=n)=h(n,n,45,50)<0.05 :