lecture14[1] - • Will finish chapter 14 today and also...

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Unformatted text preview: • Will finish chapter 14 today and also chapter 15-16 • Suggested problems: 15.5, 15.7, 15.19, 15.25, 15.27 15.31 • 16.3, 16.5, 16.7, 16.19, 16.27 • A geyser is a hot spring that becomes unstable and erupts hot gases into the air. Perhaps the most famous of these is Wyoming's Old Faithful Geyser . • Visitors to Yellowstone park most often visit Old Faithful to see it erupt. Consequently, it is of great interest to be able to predict the interval time of the next eruption. • Consider a sample of 272 interval times between eruptions. The first few lines of the available data are: • Consider a histogram to shed some light upon the nature of the intervals between eruptions • What do we observe? Histogram of waiting times between eruptions g tim Frequency 40 100 10 20 30 40 50 • What does the scatter-plot tell us? 1.5 2.0 2.5 3.0 ¡.5 4.0 ¢.5 5.0 50 60 70 80 90 Scatter-plot of waiting times versus length of previous eruption Length of eruption (minutes) Waiting time (minutes) • Consider two histograms for waiting time between eruptions • What do we observe? Histogram of waiting times between eruptions: eruption length >= 3 minutes Frequency 60 100 10 20 30 40 50 Histogram of waiting times between eruptions: eruption length< 3 minutes ing time (minutes) Frequency 4 5 60 6¡ 70 7¡ 5 10 ¢5 20 £5 30 • So, what can we tell people who arrive at the park about waiting for the Old Faithful geyser? •...
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This note was uploaded on 03/28/2011 for the course STAT 100 taught by Professor D during the Spring '11 term at Simon Fraser.

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lecture14[1] - • Will finish chapter 14 today and also...

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