The distribution of warfare over time was studied by a researcher. He deduces from the data that the number of wars that start in a given year follows a approximately  Poisson distribution with a parameter λ=2.8. Find the probability that the following number of wars will occur if a calendar year is chosen at random: Zero At most two More than 7 At most 10 Less than 6

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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The distribution of warfare over time was studied by a researcher. He deduces from the data that the number of wars that start in a given year follows a approximately  Poisson distribution with a parameter λ=2.8. Find the probability that the following number of wars will occur if a calendar year is chosen at random:

  1. Zero
  2. At most two
  3. More than 7
  4. At most 10
  5. Less than 6
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