Question: In Problem 9.52, if the null hypothesis is that 20% of the items in the population are defective, what is the value of ZSTAT? In

In Problem 9.52, if the null hypothesis is that 20% of the items in the population are defective, what is the value of ZSTAT?
In problem
If, in a random sample of 400 items, 88 are defective, what is the sample proportion of defective items?

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