A random sample of annual percentage returns for mutual funds holding short-term U.S. government bonds is shown below. 4.5 4.6 1.8 9.8 -0.8 4.1 10.5 4.2 3.5 3.9 9.8 -1.2 7.3 Use a calculator to verify that s2 ≈ 14.047 for the preceding data. A random sample of annual percentage returns for mutual funds holding intermediate-term corporate bonds is shown below. -0.1 3.4 20.5 7.6 -0.1 18.8 -3.4 10.5 8.0 -0.9 2.6 14.9 -6.5 8.2 18.8 14.2 Use a calculator to verify that s2 ≈ 71.648 for returns from mutual funds holding intermediate-term corporate bonds. Use ? = 5% to test the claim that the population variance for annual percentage returns of mutual funds holding short-term government bonds is different from the population variance for mutual funds holding intermediate-term corporate bonds. How could your test conclusion relate to the question of reliability of returns for each type of mutual fund? (a) What is the level of significance? b) Find the value of the sample F statistic. (Use 2 decimal places.) What are the degrees of freedom? dfN dfD
A random sample of annual percentage returns for mutual funds holding short-term U.S. government bonds is shown below. 4.5 4.6 1.8 9.8 -0.8 4.1 10.5 4.2 3.5 3.9 9.8 -1.2 7.3 Use a calculator to verify that s2 ≈ 14.047 for the preceding data. A random sample of annual percentage returns for mutual funds holding intermediate-term corporate bonds is shown below. -0.1 3.4 20.5 7.6 -0.1 18.8 -3.4 10.5 8.0 -0.9 2.6 14.9 -6.5 8.2 18.8 14.2 Use a calculator to verify that s2 ≈ 71.648 for returns from mutual funds holding intermediate-term corporate bonds. Use ? = 5% to test the claim that the population variance for annual percentage returns of mutual funds holding short-term government bonds is different from the population variance for mutual funds holding intermediate-term corporate bonds. How could your test conclusion relate to the question of reliability of returns for each type of mutual fund? (a) What is the level of significance? b) Find the value of the sample F statistic. (Use 2 decimal places.) What are the degrees of freedom? dfN dfD
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A random sample of annual percentage returns for mutual funds holding short-term U.S. government bonds is shown below.
| 4.5 | 4.6 | 1.8 | 9.8 | -0.8 | 4.1 | 10.5 |
| 4.2 | 3.5 | 3.9 | 9.8 | -1.2 | 7.3 |
Use a calculator to verify that s2 ≈ 14.047 for the preceding data.
A random sample of annual percentage returns for mutual funds holding intermediate-term corporate bonds is shown below.
| -0.1 | 3.4 | 20.5 | 7.6 | -0.1 | 18.8 | -3.4 | 10.5 |
| 8.0 | -0.9 | 2.6 | 14.9 | -6.5 | 8.2 | 18.8 | 14.2 |
Use a calculator to verify that s2 ≈ 71.648 for returns from mutual funds holding intermediate-term corporate bonds.
Use ? = 5% to test the claim that the population variance for annual percentage returns of mutual funds holding short-term government bonds is different from the population variance for mutual funds holding intermediate-term corporate bonds. How could your test conclusion relate to the question of reliability of returns for each type of mutual fund?
(a) What is the level of significance?
b) Find the value of the sample F statistic. (Use 2 decimal places.)
What are the degrees of freedom?
What are the degrees of freedom?
| dfN | |
| dfD |
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