A hypothesis test is carried out at the 5% significance level.
Identify what the significance level of 5% represents.
Circle your answer.
The probability that the null hypothesis is true
The probability that the alternative hypothesis is true
The probability of rejecting the null hypothesis when it is in fact true
The proportion of the population that is in the sample
316 exam-style questions on OCR A Level Maths 2.5 Statistical Hypothesis Testing, covering 2.5.1 The language of hypothesis testing, 2.5.2 Hypothesis test for a binomial proportion, 2.5.3 Inference and significance level, 2.5.4 Sample mean as a random variable (A-level only), 2.5.5 Hypothesis test for the mean of a normal distribution (A-level only), 2.5.6 Pearson's product-moment correlation coefficient, and 2.5.7 Hypothesis test using Pearson's coefficient (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.