हिंदी

Levels of Intelligence - Distribution of I.Q.s in the Population

Advertisements

Topics

Estimated time: 8 minutes
  • Introduction
  • Core Concept
  • I.Q. Distribution
  • Real-Life Application
  • Key Points: Distribution of I.Q.s in the Population
CISCE: Class 12

Introduction

When intelligence tests are administered to thousands of people, the scores reveal a pattern known as a “bell curve” or normal distribution. Most people score near the average, while very few have very high or very low scores.

CISCE: Class 12

Core Concept

  • I.Q. (Intelligence Quotient) indicates cognitive ability compared to the overall average.
  • The average I.Q. is set at 100.
  • Most people score in the middle, with fewer at the extremes.
CISCE: Class 12

I.Q. Distribution

CISCE: Class 12

Real-Life Application

Imagine 100 students in a school:

  • Approximately 68 individuals will have IQs between 85 and 115 (average).
  • Only 2 or 3 will score lower than 70 or above 130.
CISCE: Class 12

Key Points: Distribution of I.Q.s in the Population

  • IQ scores follow a normal distribution (bell curve) when tested on a large number of people.
  • The average IQ is 100, and most people score close to this average.
  • About 68% of people score between IQ 85 and 115, which is the average range.
  • Very few people score at the extremes (below 70 or above 130).
  • In the graph, the X-axis shows IQ scores and the Y-axis shows the percentage of people in each IQ category.

Test Yourself

Advertisements
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×