MATHEMATICS · Multi-part · A Level · Mathematics · Data presentation and interpretation · Data presentation and interpretation
Problem
Heike is preparing for an athletics carnival. She records her times in seconds for the 100 m sprint each day for 4 weeks.
*Week 1:* 16.4 15.2 16.3 16.3 17.1 15.5 14.9
*Week 2:* 14.9 15.7 15.1 15.1 14.7 14.7 15.3
*Week 3:* 14.3 14.2 14.6 14.6 14.3 14.3 14.4
*Week 4:* 14.0 14.0 13.9 14.0 14.1 13.8 14.2
(1) Calculate Heike's mean and median time for each week.
(2) Do you think Heike's times have improved over the 4 week period? Explain your answer.