On the basis of the duration of an eruption of the Old Faithful geyser (example

Question

On the basis of the duration of an eruption of the Old Faithful geyser (example used in class), park rangers try to predict the waiting time to the next duration. In the figure below, a scatterplot is displayed of the duration and the time to the next eruption in seconds. 5. 100 60 40 100 150 200 250 300 Duration Does the scatterplot give reason to believe that the duration of an eruption influences the time to the next eruption? Suppose you have just observed an eruption that lasted 250 seconds. By inspecting of the scatterplot, what would you predict for the time to the next eruption? a. b.

Explanation / Answer

a) From the scatterplot an erruption influence the time to next eruption. As we can see the positive relationsip between this two variable.

b) From the scatterplot the predicted time to the next eroption is the next 80 seconds.

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