Below are the durations (in minutes) of 40 time intervals between eruptions of the geyser Old Faithful in
Yellowstone National Park.
91 51 79 53 82 51 76 82 84 53
86 51 85 45 88 51 80 49 82 75
73 67 68 86 72 75 75 66 84 70
79 60 86 71 67 81 76 83 76 55
Construct a normal probability plot for these data. Do
they appear to come from an approximately normal
distribution?
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