A biologist is estimating the number of nests on a beach. She has eight different estimates: 9, 9, 11, 15, 21, 24, 26, and 30.
Which is the median value for her estimates?
888
999
181818
212121
44 exam-style questions on OCR GCSE Biology Practical skills. Each one has a worked solution and a mark scheme showing where the marks go.