GraphModerate1 mark
10(a)
Use graph paper for this question. The marks obtained by 120 students in an English test are given below: Draw the ogive and hence, estimate:
the upper quartile marks.
Topic: Histogram / ogive / statistical graph
Previous-year question practice database
Answer
Solution diagram
Exam answer
56 marks (±1)
Explanation
The upper quartile corresponds to 3N/4 = 90th observation. Reading cumulative frequency 90 from the ogive gives approximately 56 marks.