Do college students prefer printed textbooks to electronic textbooks? You work for a textbook publisher and want to estimate the population proportion of all college students who prefer printed textbooks to electronic textbooks. So, you will survey a random sample of 90 college students. Follow the steps below to construct a 90% confidence interval for the population proportion of all college students who prefer printed textbooks to electronic textbooks. (If necessary, consult a list of formulas.) (a) Click on "Take Sample" to see the results from the random sample. Number Proportion Take Sample Prefers printed textbooks to electronic textbooks 54 0.6 Does not prefer printed textbooks to electronic textbooks 36 0.4 Enter the values of the sample size, the point estimate of the population proportion, and the critical value you need for your 90% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute". Sample size: 0 Standard error: Point estimate: 0 Margin of error: Confidence level Critical value Critical value: 99% Fo.005-2.576 90% confidence interval: 95% 20.025-1.960 Compute 90% 20.050 1.645 (b) Based on your sample, enter the lower and upper limits to graph the 90% confidence interval for the population proportion of all college students who prefer printed textbooks to electronic textbooks. 90% confidence interval: 0.000 1.000 0.000 1.000

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