In a frequency distribution, if the class marks are 5, 15, 25, 35, the class width is: MCQ with Answer and Explanation

Explanation:
For grouped data, mode = L + [(f₁ - f₀) / (2f₁ - f₀ - f₂)] × h, where L=lower limit of modal class, f₁=frequency of modal class, f₀=previous class frequency, f₂=next class frequency, h=class width.

Explanation:
Blood group is a categorical attribute.

Explanation:
Value index = (Σp₁q₁ / Σp₀q₀) × 100 = 700/500 × 100 = 140.