Measures of locationEdexcel International A Level Maths: Mind map

Exam questions on Measures of location

1. A hockey team scored the following numbers of goals in its first 10 matches of a season: 0, 1, 1, 2, 2, 2, 3, 3, 4, 6.
   The team plays two more matches. The mean number of goals per match over all 12 matches is then 2.5. Find the total number of goals scored in the two extra matches.2 marks
2. The times, in minutes, taken by 40 students to complete a puzzle are summarised as follows: 0 to under 10 minutes, 4 students; 10 to under 20 minutes, 10 students; 20 to under 30 minutes, 16 students; 30 to under 50 minutes, 10 students. Assume that times are spread evenly within each class.
   Use linear interpolation to estimate the median time.2 marks
3. The masses, $m$ grams, of a sample of 20 packets of rice are coded using $y=\frac{m-500}{10}$. It is given that $\sum y=36$.
   Find the mean mass of the 20 packets.3 marks