GraphModerate2 marks
9(a)
40 students enter for a game of shot-put competition. The distance thrown (in metres) is recorded below: Use a graph paper to draw an ogive for the above distribution. Use a scale of 2 cm = 1 m on one axis and 2 cm = 5 students on the other axis. Hence using your graph find:
Upper Quartile
Topic: Histogram / ogive / statistical graph
Previous-year question practice database
Answer
Solution diagram
Exam answer
Upper quartile = 15.75 ± 0.2
Explanation
The upper quartile is the 30th observation because 3N/4 = 30. The ogive gives approximately 15.75 m at cumulative frequency 30.