Question 864069
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Hi
POISSON  1.3 hr = 78 min
a) &#8805; 75   P(x<21) = 24.26%
  15-19   P(x<21) = 0%
b) &#8805; 75   P(x>120) = 0
  15-19   P(x>120 ) = 0
c) P( 42 &#8804; x &#8804; 126) = P(x &#8804; 126) - P( x &#8804; 42)
 poissoncdf(24, 126) - poisssoncdf(24,42) = 1 - .9997 = .0003
etc
d) X = poissinv(P,lambda) = poissinv(.28, 24)
   X = poissinv(P,lambda) = poissinv(.28, 78)