A random sample of size 1,000 is taken from a population where p = .20. Find P( pˆ < .22).
Added by Bryan F.
Step 1
The formula for this is sqrt[(p(1 - p) / n], where p is the population proportion and n is the sample size. Substituting the given values, we get sqrt[(.20(1 - .20) / 1000] = sqrt[(.20*.80) / 1000] = sqrt[.16 / 1000] = sqrt[.00016] = 0.01265. Show more…
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