19. Old Faithful The following data are the waiting times between eruptions of the Old Faithful geyser in Yellowstone National Park.25 Use a graph to describe the waiting times. If there are any unusual features in your graph, see if you can think of any practical explanation for them.

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56 89 51 79 58 82 52 88 52 78 69 75 77 53 80 54 79 74 65 78 55 87 53 85 61 93 54 76 80 81 59 86 78 71 77 89 45 93 72 71 76 94 75 50 83 82 72 77 75 65 79 72 78 77 79 72 82 74 80 49 75 78 64 80 49 49 88 51 78 85 65 75 68 87 93 50 78 77 69 92 91 53 86 49 79 61 81 55 93 53 84 70 73 87 77 74 89 87 76 59 80