The manager of a computer software company wishes to study the number of hours junior executives by type of industry spend at their desktop computers per day. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can he conclude there is a difference in the mean number of hours spent per week by industry?
| Accounting |
Legal |
Insurance |
| 3 |
7 |
3 |
| 2 |
5 |
8 |
| 1 |
5 |
5 |
| 4 |
2 |
3 |
| 3 |
4 |
2 |