need explain and ans please.

10 Of 41 bank customers depositing a check, 22 received 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 5 decimal places.) points The 90% confidence interval is from Skipped Book (b) May normality of p be assumed? Ask Yes O No Print References 6 A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean is =770 and the sample standard deviation is s= 25. Use Appendix D to find the values of Student's & 5 points (a) Construct an interval estimate of p with 95% confidence. (Round your answers to 3 decimal places.) The 95% confidence interval is from Book to Ask (b) Construct an interval estimate of / with 95% confidence, assuming that s= 50. (Round your answers to 3 decimal places.) The 95% confidence interval is from Print 10 References (c) Construct an interval estimate of / with 95% confidence, assuming that s= 100. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (d) Describe how the confidence interval changes as s increases. The interval stays the same as s increases. The interval gets wider as s increases. The interval gets narrower as s increases