Old Faithful in Yellowstone National Park has a predictable eruption time. The park rangers use a formula that takes into account the length of the previous eruption and
has proven to be accurate to plus or minus 10 minutes for 90% of the time.
a.
what is the eruption interval?
b what does 90% of the time mean

How often does Old Faithful blow?

The world's most famous geyser, Old Faithful in Yellowstone, currently erupts around 20 times a day. These eruptions are predicted with a 90 percent confidence rate, within a 10 minute variation, based on the duration and height of the previous eruption.

Step-by-step explanation:

How often does Old Faithful blow?

The world's most famous geyser, Old Faithful in Yellowstone, currently erupts around 20 times a day. These eruptions are predicted with a 90 percent confidence rate, within a 10 minute variation, based on the duration and height of the previous eruption.

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