Assume that the population standard deviations are equal for income mutual funds and growth mutual funds. Use the following sample data to test whether there is a difference in the mean yields of the two funds at the 0.05 level of significance.
|
Income |
Growth |
| Sample size |
45 |
60 |
| Sample Mean |
500 |
775 |
| SampleStandard Deviation |
25 |
55 |
What is the null hypothesis? Alternative hypothesis?
What is the computed value of the test statistic t?