Statistics: measures of central tendency — KCSE Mathematics
KCSE Mathematics · 105 practice questions · 4 syllabus objectives
What You'll Learn
Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.
Calculate the mean, median and mode for ungrouped data; state which measure is most appropriate in a given context
Calculate the mean of grouped data using the mid-class value; estimate the mode and median from a frequency table or histogram
Compare data sets using their means and medians; explain the effect of outliers on the mean
Statistics: measures of central tendency
Sample Questions
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Explain how an outlier of 100 affects the mean and median of the following data set: {10, 20, 30, 40, 50}. (4 marks)
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Identify the mean and median of the following set of scores: {12, 15, 22, 30, 45}. (4 marks)
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From the frequency distribution of daily temperatures recorded over a week: 20°C (2), 21°C (3), 22°C (5), 23°C (4), determine the mode. (2 marks)
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From the following set of daily temperatures (°C): 15, 18, 20, 18, 22, 23, 18, state the mean and explain which measure of central tendency is most informative in this context. (4 marks)
Why Practise Statistics: measures of central tendency?
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