Edexcel S2 2006 June — Question 5

Exam BoardEdexcel
ModuleS2 (Statistics 2)
Year2006
SessionJune
TopicApproximating Binomial to Normal Distribution
TypeSmall sample binomial probability

  1. A manufacturer produces large quantities of coloured mugs. It is known from previous records that \(6 \%\) of the production will be green.
A random sample of 10 mugs was taken from the production line.
  1. Define a suitable distribution to model the number of green mugs in this sample.
  2. Find the probability that there were exactly 3 green mugs in the sample. A random sample of 125 mugs was taken.
  3. Find the probability that there were between 10 and 13 (inclusive) green mugs in this sample, using
    1. a Poisson approximation,
    2. a Normal approximation.