2. interpret your results. Choose the correct answer below. a. with 99% confiden

Question

2. interpret your results. Choose the correct answer below.

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

b. with the 99% confidence, it can be said that the sample proportion of adults who say they have started paying bills online in the last year is between the endpoints of the given confidence interval

c. the endpoints of the given confidence interval show that adults pay online 99% of the time.

In a survey of 2716 adults, 1400 say they have started paying bills online in the last year. Construct a 99% confidence interval for the population proportion. Interpret the results. A 99% confidence interval for the population proportion is U ) Round to three decimal places as needed.)

Explanation / Answer

here p=1400/2716 =0.5155 and n=2716

std error =(p(1-p)/n)1/2 =0.0096

for 99% CI ; z =2.5758

hence 99% confidence interval = p -/+ z*std error =0.491 ; 0.540

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

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