AQ3.1: Activity Question 1

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Activity focus

• raw numerical data counting
• frequency table construction
• cumulative frequency reading

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Practice set

• 6, 7, 6, 8, 9, 7, 6, 8, 7, 7

1. Construct a frequency table.
2. Find the total number of observations.
3. Find the cumulative frequency at 8.
4. Which value is the mode from this table?

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Answer key

1. • 6 -> 3
   • 7 -> 4
   • 8 -> 2
   • 9 -> 1
2. 10
3. 9
4. 7

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Common mistakes

• forgetting one repeated value
• writing cumulative frequency in random order
• not checking whether all frequencies sum to the total