# Question: Determine the margin of error for a confidence interval to

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 0.40 and n = 100:

a. 90%

b. 95%

c. 97%

a. 90%

b. 95%

c. 97%

**View Solution:**## Answer to relevant Questions

Determine the margin of error for a 95% confidence interval to estimate the population proportion with a sample proportion equal to 0.70 for the following sample sizes: a. n = 125 b. n = 200 c. n = 250 According to the Centers for Disease Control and Prevention, 20.6% of the U. S. population smoked in 2008. In 2014, a random sample of 650 Americans was selected; 108 of whom smoked. a. Construct a 90% confidence interval ...Determine the sample size needed to construct a 95% 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 Construct a 90% confidence interval to estimate the population mean using the following data: x = 70 σ = 20 n = 40 N = 400 The following data show the costs charged by a tax preparation service for a random sample of 15 tax returns. These data can also be found in the Excel file titled tax prep costs. xlsx. a. Using a 98% confidence interval, ...Post your question