9709 P63 - Jun 2026 - Q1 - 3 marks
9166
A five-sided spinner has edges marked 1, 2, 3, 4, 5. Ayesha believes that the spinner is biased so that it lands on five more often than it should. She spins the spinner 200 times, and it lands on five on 60 spins.
Use Ayesha’s result to calculate an approximate \(94\%\) confidence interval for the probability that the spinner lands on five on one spin. [3]