Mathematics 9709 · AS & A Level · Sampling and estimation

Sampling and estimation — practice question

These are the times, in minutes, required by 11 runners to finish a 10 km run: 48.3, 55.2, 59.9, 67.7, 60.5, 75.6, 62.5, 57.4, 53.4, 49.2, 64.1.

(main)[3]

Find the mean and standard deviation of these times.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Mean worked out correctly, $\bar{x}=59.4$” …