Discussion:
Q: Emergency room arrivals in a large hospital showed the statistics below for 2 months. At σ = .05, has the variance changed? Show all steps clearly, including an illustration of the decision rule.
| Statistic |
January |
February |
| Mean arrivals |
176.0236 |
170.2344 |
| Standard deviation |
14.04306 |
15.9726 |
| Days |
31 |
28 |