est. Week 8 Final Exam (Grade This Question: 1 pt In a survey of 3338 adults, 14

Question

est. Week 8 Final Exam (Grade This Question: 1 pt In a survey of 3338 adults, 1491 say they have started paying bills online in the Construct a 99% confidence interval for the population proportion. Interpret the A 99% confidence interval for the population proportion is ( ) (Round to three decimal places as needed.) Interpret your results. Choose the correct answer below A. With 99% confidence, it can be said that the population proportion of ad O B. The endpoints of the given confidence interval show that adults pay bills c, with 99% confidence, it can be said that the sample proportion of adults Click to seleet vour answeris

Explanation / Answer

p = 1491/3338

99% confidence interval for population proportion: p ± z*standard error

Where z is the multiplier for 99% = 2.576

And standard error = [p(1-p)/n] = [0.44668*0.553330/3338] = 0.0086

99% confidence interval for population proportion: 0.44668 ± 2.576*0.0086

99% confidence interval for population proportion: (0.424526, 0.468834)

Conclusion:

a)With 99% confidence interval, it can be said that the population proportion of adults who say they have started paying bills online in the last year.

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