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Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion for the following sample proportions when the margin

Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion for the following sample proportions when the margin of error equals 4%.

a. p=0.30

b. p=0.40

c. p=0.50

Click the icon to view a table of standard normal cumulative probabilities.

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