A public library is investigating members’ views about its study spaces. Of all the library’s members, 40% are aged 16–24. A researcher selects a sample of 30 members, of whom 18 are aged 16–24.
Complete the calculation below to find the percentage of the sample who are aged 16–24.
18 ÷ 30 × 100 = ........ %
The researcher concludes that the sample is representative of all the library’s members.
Is the researcher’s conclusion correct? Give a reason for your answer.
182 exam-style questions on OCR GCSE Psychology 7.1 Planning Research, covering 7.1.1 Hypotheses, 7.1.2 Variables, 7.1.3 Experimental Designs, 7.1.4 Populations and Sampling, 7.1.5 Ethical issues, and 7.1.6 Dealing with ethical issues and BPS Code. Each one has a worked solution and a mark scheme showing where the marks go.