Question

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A sample containing years to maturity and yield for 40 corporate bonds are contained in the data given below.

Years to Maturity	Yield	Years to Maturity	Yield
23.75	5.733	18.75	6.397
22.25	0.939	18.50	6.988
25.00	7.016	28.00	7.849
2.75	3.219	19.25	2.202
26.75	6.579	29.75	6.383
28.50	1.487	7.75	7.250
28.25	3.846	10.25	2.962
19.25	2.796	6.50	4.389
11.50	1.287	11.75	3.755
2.00	5.114	29.75	3.592
12.25	3.991	19.50	6.449
22.00	2.850	24.50	6.275
8.00	8.161	10.25	6.019
1.50	2.248	9.75	1.360
26.75	3.216	6.75	3.384
12.00	2.095	25.25	4.193
9.00	5.708	18.50	5.089
8.75	5.241	23.25	5.750
11.50	2.793	7.50	5.471
16.00	1.135	15.25	3.074

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 95% 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)

Answer 1