Mean, Median, Mode & Dispersion

Arithmetic/Geometric/Harmonic Mean, Median, Mode, Standard Deviation, and Variance.

Target: EPFO APFC 2026•Topic-Level RAG Context Active•Model: Nemotron 3.5 Lightning 30B / 120B

Topic Overview

Arithmetic/Geometric/Harmonic Mean, Median, Mode, Standard Deviation, and Variance.

Relationship between Mean, Median, and Mode: Mode = 3*Median - 2*Mean (empirical relationship)
Geometric Mean (for growth rates) & Harmonic Mean (for average speed/rates)
Measures of Dispersion: Range, Quartile Deviation, Variance (σ²), Standard Deviation (σ)
Coefficient of Variation (CV = (σ / Mean) * 100)

💡 Mode = 3 Median - 2 Mean for moderately skewed distributions.
💡 Standard deviation is unaffected by change of origin (adding/subtracting constant) but affected by change of scale.

3 Matched PYQs

2025•EPFO APFC•General Ability Test• Q.42

Which of the following statements about National e-Vidhan Application (NeVA) is/are correct?

It is a Mission Mode Project (MMP) under the Digital India Programme (DIP) of the Government of India.

This application is based on the principle of 'One Nation - One Application'.

It has been developed by the Parliament Secretariat.

Its core aim is for end-to-end digitalisation of all the functions of the State Legislatures.

2025•EPFO APFC•General Ability Test• Q.43

Support for Marginalized Individuals for Livelihood and Enterprise (SMILE) Scheme is meant for the rehabilitation of:

Transgender persons

Persons engaged in the act of Begging

2025•EPFO APFC•General Ability Test• Q.60

For training and deploying complex models in Artificial Intelligence, which one among the following is preferred ?

Launch the interactive AI teacher or solve full mock tests.