Recall the formula for a proportion confidence interval is p^?zp^(1?p^)n?????????<p<p^+zp^(1?p^)n????????? Thus, the margin of error is...
Recall the formula for a proportion confidence interval is
p^?zp^(1?p^)n?????????<p<p^+zp^(1?p^)n?????????
Thus, the margin of error is E=zp^(1?p^)n????????? .
NOTE: the margin of error can be recovered after constructing a confidence interval on the calculator using algebra (that is, subtracting p^ from the right endpoint.)
In a simple random sample of size 59, taken from a population, 20 of the individuals met a specified criteria.
a) What is the margin of error for a 90% confidence interval for p, the population proportion?
b) What is the margin of error for a 95% confidence interval for p?
NOTE: These margin of errors are greater than .10 or 10%.
c) How big of a sample is needed to be certain that we have a margin of error less than .10 (or 10%) at 90% confidence?
d) How big of a sample is needed to be certain that we have a margin of error less than .10 (or 10%) at 95% confidence?
Homework Answers
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Recall the formula for a proportion confidence interval is
p^?zp^(1?p^)n?????????<p<p^+zp^(1?p^)n?????????
Thus, the margin of error is...
הסט Determine the margin of error for a confidence interval to estimate the population proportion for...
הסט Determine the margin of error for a confidence interval to estimate the population proportion for the following confidence levels with a sample proportion equal to 0.35 and n 120 Nama 90% c.99% Click the icon to view a portion of the Cumulative Probabilities for the Standard Normal Distribution table Due: Curre Atter Late The margin of enor for a confidence interval to o und to three decimal places as needed) imate the population proportion for the confidence levels
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Question Help 8.4.3 Determine the margin of error for a confidence interval to estimate the population...
Question Help 8.4.3 Determine the margin of error for a confidence interval to estimate the population proportion for the following confidence levels with a sample proportion equal to 0.38 and n 100. a, 90% b. 95% c.98% Click the icon to view a portion of the Cumulative Probabilities for the Standard Normal Distribution table a. The margin of error for a confidence interval to estimate the population proportion for the 90% confidence level is Round to three decimal places as...
DOH Determine the margin of error for a 90% confidence interval to estimate the population proportion...
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הסט Determine the margin of error for a confidence interval to estimate the population proportion for the following confidence levels with a sample proportion equal to 0.35 and n 120 Nama 90% c.99% Click the icon to view a portion of the Cumulative Probabilities for the Standard Normal Distribution table Due: Curre Atter Late The margin of enor for a confidence interval to o und to three decimal places as needed) imate the population proportion for the confidence levels
Question Help 8.4.3 Determine the margin of error for a confidence interval to estimate the population proportion for the following confidence levels with a sample proportion equal to 0.38 and n 100. a, 90% b. 95% c.98% Click the icon to view a portion of the Cumulative Probabilities for the Standard Normal Distribution table a. The margin of error for a confidence interval to estimate the population proportion for the 90% confidence level is Round to three decimal places as...
DOH Determine the margin of error for a 90% confidence interval to estimate the population proportion with a sample proportion equal to 0.90 for the following sample sizes. an 100 bin 200 cn=260 Nam Due Click the icon to view a portion of the Qurtulative Probabilities for the Standard Normal Distribution table. Currea. The main forror for a 90% confidence interval to estimate the population proportion with a sample proportion equal to 0.90 and sample siren 100 is (Round to...
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