For a fair spinner, the probability of landing on blue is 0.25. Alex believes that the spinner is biased towards blue. In 40 independent spins, the spinner lands on blue 15 times.
State suitable hypotheses.
Calculate the p-value.
Complete the test at the 5% level of significance.
209 exam-style questions on CCEA A Level Maths 4.6 Statistical hypothesis testing (A-level only), covering 4.6.1 Statistical hypothesis testing (A-level only), 4.6.2 Statistical hypothesis testing (A-level only), 4.6.3 Statistical hypothesis testing (A-level only), 4.6.4 Statistical hypothesis testing (A-level only), and 4.6.5 Statistical hypothesis testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.