a hospital administrator wishes to know what proportion of discharged patients are unhappy with the care received during hospitalisation. if 95% confidence interval is desired to estimate the proportion within 5%, how large a sample should be drawn?
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Step 1
We know that the formula for the confidence interval for a proportion is p̂ ± Z * √((p̂(1-p̂))/n), where p̂ is the sample proportion, Z is the Z-score corresponding to the desired confidence level, and n is the sample size. Show more…
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