Essentials of Statistics (5th Edition)
5th Edition
ISBN: 9780321924599
Author: Mario F. Triola
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 1RE
Old Faithful The table below lists measurements from eight different eruptions of the Old Faithful geyser in Yellowstone National Park. The data consist of the duration (see) of the eruption, height (ft) of the eruption, time interval (min) before the eruption, and time interval (min) alter the eruption. Shown below are Minitab results obtained by using the durations and interval-after times.
- a. Determine whether there is sufficient evidence to support a claim of a
linear correlation between duration and interval-after time for eruptions of the Old Faithful geyser. - b. What percentage of the variation in interval-after times can be explained by the linear correlation between interval-after times and durations?
- c. Letting y represent interval-after time and letting x represent duration time, identify the regression equation.
- d. If an eruption has a duration of 200 see, what is the best predicted value for the time interval after the eruption to the next eruption?
Eruptions of the Old Faithful Geyser
| Duration | 240 | 120 | 178 | 234 | 235 | 269 | 255 | 220 |
| Height | 140 | 110 | 125 | 120 | 140 | 120 | 125 | 150 |
| Interval Before | 98 | 90 | 92 | 98 | 93 | 105 | 81 | 108 |
| Interval After | 92 | 65 | 72 | 94 | 83 | 94 | 101 | 87 |
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Chapter 10 Solutions
Essentials of Statistics (5th Edition)
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