CAIE S2 2015 June — Question 3

Exam BoardCAIE
ModuleS2 (Statistics 2)
Year2015
SessionJune
TopicHypothesis test of a normal distribution

3 A die is biased so that the probability that it shows a six on any throw is \(p\).
  1. In an experiment, the die shows a six on 22 out of 100 throws. Find an approximate \(97 \%\) confidence interval for \(p\).
  2. The experiment is repeated and another \(97 \%\) confidence interval is found. Find the probability that exactly one of the two confidence intervals includes the true value of \(p\).