Wood Duck Weights

  1. The percentage of wood ducks that weigh more than 575 g is 0.6%. 
    2. > distrib(575,mean=450,sd=50,lower.tail=FALSE)
  1. The percentage of wood ducks that weigh less than 420 g is 27.4%. 
    2. > distrib(420,mean=450,sd=50)
  1. The percentage of wood ducks that weigh betwen 360 and 480 g is 69.0%. 
    2. > ( ab <- distrib(480,mean=450,sd=50) )
    [1] 0.7257469
    > ( a <- distrib(360,mean=450,sd=50) )
    [1] 0.03593032
    > ab-a
    [1] 0.6898166
  1. The lightest 10% of wood ducks weigh less than 386 g. 
    2. > distrib(0.10,mean=450,sd=50,type="q")
  1. The heaviest 25% of wood ducks weigh more than 484 g 
    2. > distrib(0.25,mean=450,sd=50,type="q",lower.tail=FALSE)