CAIE S2 2023 June — Question 6

Exam BoardCAIE
ModuleS2 (Statistics 2)
Year2023
SessionJune
TopicHypothesis test of binomial distributions
TypeCalculate Type I error probability

6 When a child completes an online exercise called a Mathlit, they might be awarded a medal. The publishers claim that the probability that a randomly chosen child who completes a Mathlit will be awarded a medal is \(\frac { 1 } { 3 }\). Asha wishes to test this claim. She decides that if she is awarded no medals while completing 10 Mathlits, she will conclude that the true probability is less than \(\frac { 1 } { 3 }\).
  1. Use a binomial distribution to find the probability of a Type I error.
    The true probability of being awarded a medal is denoted by \(p\).
  2. Given that the probability of a Type II error is 0.8926 , find the value of \(p\).