A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find the 95% confidence interval of the population proportion of workers who are interrupted by these calls.

In a survey of 2567 ​adults, 1431 say they have started paying bills online in the last year.   Construct a​ 99% confidence interval for the population proportion. Interpret the results.

In a study of 150 burglary incidents witnessed by the youngsters, 43% lead those young people develop PTSD.  Find the 99% confidence interval of the true proportion of burglary incidents that lead the youngsters to develop PTSD.

In a certain state, a survey of 500 workers showed that 38% belonged to a union.  Find the 93% confidence interval for the overall proportion of workers who belong to a union

In a survey, 545 college students are randomly selected and asked whether or not they own a car. Of those surveyed, it is found that 210 own a car. Use this data to find a 99% confidence interval for the true proportion of all college students who own a car.

Out of 3064 respondants, 919 of them said they have a dog. Using this data, compute a 95% confidence interval for the true proportion of people who own a dog.

In a survey of 3500 ​adults, 1443 say they have started paying bills online in the last year.   Construct a​ 99% confidence interval for the population proportion. Interpret the results.

Out of 100 people sampled, 40 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids.

Of 130 adults selected randomly from one town, 25 of them smoke. Construct a 99% confidence interval for the true percentage of all adults in the town that smoke.

In the United States, 1000 residents aged 15 or older were surveyed and 870 replied that they were satisfied with the water quality. The 90% confidence interval estimate of all U.S residents satisfied with their water quality is