Of 54 bank customers depositing a check, 17 recelved some cash back. (a) Construct a 90 percent confidence Interval for the proportion of all depositors who ask for cash back. (Round your answers to 4 decimal places.) The 90% confidence interval is from to (b) May normality of p be assumed? O Yes O No

A newsgroup is interested in constructing a 99% confidence interval for the proportion of all Americans who are in favor of a new Green initiative. Of the 536 randomly selected Americans surveyed, 428 were in favor of the initiative. Round answers to 4 decimal places where possible. a. With 99% confidence the proportion of all Americans who favor the new Green initiative is between and

A random survey of 500 students was conducted from a population of 2,200 students to estimate the proportion who had part-time jobs. The sample showed that 205 had part-time jobs. Calculate the 95 percent confidence interval for the true proportion of students who had part-time jobs. (Round your answers to 3 decimal places.) The 95% confidence interval is from to

d) Construct a 90% confidence interval for Hcommunity college - Hno transfer to approximate the mean additional time it takes to complete a bachelor's degree if you begin in community college. The confidence interval is the range from to (Round to three decimal places as needed.)