A national park is famous for its beautiful desert landscape and its many natura

Question

A national park is famous for its beautiful desert landscape and its many natural rock formations. The following table is based on information gathered by a park ranger of all rock formations of at least 3 feet. The height of the rock formation is rounded to the nearest foot.

For a rock formation chosen at random from this park, use the preceding information to estimate the probability that the height of the rock formation is as follows. (Round your answers to two decimal places.)

(a) 75 feet or taller

Height of rock formation, feet 3–9 10–29 30–49 50–74 75 and higher Number of rock formations in park 118 84 23 32 12

Explanation / Answer

Prob ( 75 feet or taller ) = number of rocks 75 feet or taller / total number of rocks

= 12 / 269

Prob ( 75 feet or taller )= 4.46%

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