Discussion Questions

  1. Figure 8.9 shows summer air visibility measurements for Denver, Colorado. The acceptable visibility standard is 100, with readings above 100 indicating clean air and good visibility, and readings below 100 indicating temperature inversions caused by forest fires, volcanic eruptions, or collisions with comets.

    A graph on summer air visibility measurements plots visibility rating on the Y axis, versus selected dates of late July and August, on the X axis. Lines for two years of visibility ratings are shown.

    Figure 8.9 Summer Air Visibility Measurements

    1. Is a trend evident in the data? Which time-series techniques might be appropriate for estimating the average of these data?

    2. A medical center for asthma and respiratory diseases located in Denver has great demand for its services when air quality ...

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