Examples
EX 2B Q1
- Modal class = \(351\)-\(400\)
- Estimated mean = \(24.84\)
- \(\Sigma \text{frequency}=65\)
- \(\frac{65}{2}=32.5\)
- Therfore the interval containing the mean is \(351\)-\(400\)
EX 2B Q3
- Modal class = \(10\leq t<12\)
- Estimated mean = \(\frac{353}{3+7+9+7+3+2}=11.39\)