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Poisson Distribution
5. Binomial Distribution & Discrete Random Variables / Poisson Distribution / 문제 3
문제 3

A city was partitioned into small zones of equal area and the number of meteorite strikes per zone was recorded as follows:
Table showing number of meteorite strikes per zone with frequencies: 0 strikes-120 zones, 1 strike-45, 2 strikes-20, 3 strikes-10, 4 strikes-5.
Estimate the mean number of strikes per zone and round your answer to four decimal places.