Question
Listed below are time intervals (min) between eruptions of a geyser. The "recent" times are within...
Listed below are time intervals (min) between eruptions of a geyser. The "recent" times are within the past few years, and the "past" times are from 1995. Does it appear that the variation of the times between eruptions has changed? Use a 0.05 significance level. Assume that the two populations are normally distributed.
| 77 | 86 |
| 90 | 91 |
| 91 | 93 |
| 76 | 96 |
| 57 | 62 |
| 101 | 87 |
| 62 | 89 |
| 90 | 92 |
| 69 | 84 |
| 92 | 95 |
| 84 | 86 |
| 81 | 96 |
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56
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58
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60
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69
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71
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72
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