Chapter 12: Statistics

Questions

1. Median of $12, 15, 18, 20, 22, 25, 27$.
2. Mode of $4, 5, 4, 6, 4, 7, 5$.
3. Mean of first $10$ natural numbers.
4. Range of $10, 25, 12, 8$.
5. Class mark of $10-20$.
6. Median of $6, 8, 10, 12, 14, 16$.
7. Mean of $4, 6, 8, 10, 12$.
8. Range of $12, 25, 18, 45, 30$.
9. Combined mean if $5$ obs. avg $18$ and $4$ obs. avg $15$.
10. Number of observations if sum is $150$ and mean is $10$.

Extra Practice (Optional)

• Bar graph for scores $3, 5, 7, 6, 4$.
• Mode of $2, 3, 2, 5, 3, 2, 6, 3, 3$.
• Median of $101, 102, 105, 107, 110$.
• Draw histogram for frequency $2,5,6,4,3$ over classes $0-10,10-20,20-30,30-40,40-50$.
• Mean when data is $1,2,3,\ldots,20$.