Asample containing years to maturity and yield for corporate bonds are contained in the data given below. years to maturity yield years to maturity yield 19.50 7.758 24.00 2.778 23.00 8.145 20.00 4.132 11.75 7.542 21.00 3.882 16.50 2.469 5.75 2.242 28.50 2.596 17.00 3.235 2.50 2.835 9.25 1.786 21.75 6.441 16.50 2.935 8.75 4.372 23.25 3.524 27.00 3.164 4.50 3.425 16.00 8.038 18.00 4.886 15.50 0.942 29.00 6.483 5.00 1.567 26.50 6.342 13.25 8.032 22.75 1.611 25.25 2.257 1.00 6.918 5.50 2.974 15.00 3.834 18.25 7.869 2.25 8.055 14.75 7.786 22.00 1.071 27.25 3.311 15.50 1.655 17.25 2.654 21.00 1.515 23.00 5.609 19.00 2.179 a. what is the sample mean years to maturity for corporate bonds and what is the sample standard deviation? mean (to 4 decimals) standard deviation (to 4 decimals) b. develop a confidence interval for the population mean years to maturity. round the answer to four decimal places. , years c. what is the sample mean yield on corporate bonds and what is the sample standard deviation? mean (to 4 decimals) standard deviation (to 4 decimals) d. develop a confidence interval for the population mean yield on corporate bonds. round the answer to four decimal places. , percent check my work