Edexcel AS Paper 2 2022 June — Question 2

Exam BoardEdexcel
ModuleAS Paper 2 (AS Paper 2)
Year2022
SessionJune
TopicHypothesis test of binomial distributions
TypeMultiple binomial probability calculations

  1. A manufacturer of sweets knows that \(8 \%\) of the bags of sugar delivered from supplier \(A\) will be damp.
    A random sample of 35 bags of sugar is taken from supplier \(A\).
    1. Using a suitable model, find the probability that the number of bags of sugar that are damp is
      1. exactly 2
      2. more than 3
    Supplier \(B\) claims that when it supplies bags of sugar, the proportion of bags that are damp is less than \(8 \%\) The manufacturer takes a random sample of 70 bags of sugar from supplier \(B\) and finds that only 2 of the bags are damp.
  2. Carry out a suitable test to assess supplier B's claim. You should state your hypotheses clearly and use a \(10 \%\) level of significance.