A researcher recorded the time between consecutive eruptions (in minutes) of the Old Faithful geyser in Yellowstone National Park over an 8-day period. A graph and some summary statistics from
Crunchlt! software are shown below.
Frequency
20
15
10
5
0
40 50 60 70 80 90 100
interval
Summary statistics:
Column n Mean Variance Std. Dev. Std. Err. Median Range Min Max Q1 Q3
interval 107 71 168.13208 12.966576 1.2535261 75
53
95 58 81
42.
1. Draw an appropriate density curve for summarizing the histogram on the graph above. How
would you describe the shape of this density curve?