A sample containing years to maturity and yield for corporate bonds are contained in the data given below.
Years to Maturity Yield Years to Maturity Yield
2.75 8.094 11.75 1.306
19.50 7.280 27.75 5.764
27.50 8.137 2.50 3.896
18.00 5.612 16.25 0.926
21.50 3.237 21.25 4.878
27.25 6.377 18.75 7.898
10.25 4.821 12.50 2.915
18.00 5.296 6.00 6.598
8.50 1.245 14.25 2.895
25.75 5.578 19.25 7.739
7.50 2.131 4.00 2.105
8.25 2.515 17.00 8.171
5.50 2.991 23.25 4.930
11.00 3.943 16.75 3.619
28.75 3.536 11.00 7.630
19.75 3.940 16.25 6.099
12.75 5.350 20.25 2.842
14.00 6.207 23.50 7.455
5.25 3.036 21.00 7.044
26.75 2.102 17.75 3.342
a. What is the sample mean years to maturity for corporate bonds and what is the sample standard deviation?
b. Develop a 95% confidence interval for the population mean years to maturity. Round the answer to four decimal places.
c. What is the sample mean yield on corporate bonds and what is the sample standard deviation?
d. Develop a 95% confidence interval for the population mean yield on corporate bonds. Round the answer to four decimal places.