Kwame is studying the time it takes members of his gym to travel to the gym.
He stands by the door of the gym in the morning and asks the first 40 members as they arrive how long their journey was.
The sampling method Kwame used was opportunity sampling. State how Kwame obtained his sample.
An alternative method of non-random sampling Kwame could have used was quota sampling. State and briefly describe how this method could have been used to obtain a sample of 40 members.
59 exam-style questions on Edexcel A Level Maths Data Collection, covering 1.1 Populations and Samples, 1.2 Sampling, 1.3 Non-Random Sampling, 1.4 Types of Data, and 1.5 The Large Data Set. Each one has a worked solution and a mark scheme showing where the marks go.