Statistics: data collection and presentation — KCSE Mathematics
KCSE Mathematics · 114 practice questions · 4 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Collect and organise data into frequency tables; draw and interpret bar charts, histograms, frequency polygons and pie charts
Construct and interpret cumulative frequency tables and curves (ogives); estimate the median from a cumulative frequency curve
Distinguish between grouped and ungrouped data; choose appropriate class intervals and construct frequency tables
Statistics: data collection and presentation
Sample Questions
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Define grouped data and ungrouped data in the context of statistics. (4 marks)
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Explain how to construct a cumulative frequency table from the following data on the ages of participants in a community event: 20, 22, 25, 25, 27, 28, 30, 30, 30, 32, 35. (4 marks)
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In a survey of 50 households, the number of pets owned was recorded as follows: 0 pets: 20 households, 1 pet: 15 households, 2 pets: 10 households, 3 pets: 5 households. (a) State the total number of households surveyed. [1 mark] (b) Describe how you would represent this data using a pie chart. [3 marks]
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A class of 30 students was surveyed to find out how many hours they spent on homework each week. The data collected is as follows: 0-2 hours: 5 students, 3-5 hours: 10 students, 6-8 hours: 8 students, 9-11 hours: 7 students. (a) Construct a frequency distribution table for the data. [2 marks] (b) Identify the modal class from the frequency distribution. [2 marks]
Why Practise Statistics: data collection and presentation?
KNEC Aligned
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