The sum of frequencies of all classes in a distribution equals: 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:
Neonatal deaths (0-28 days) are part of infant deaths.

Explanation:
Median is robust to outliers, unlike mean.