Measures Of Central Tendency
Chapter Name : Statistics |
Sub Topic Code : 104_09_14_05_01 |
Topic Name : Measures Of Central Tendency |
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Sub Topic Name : Measures Of Central Tendency |
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Introduction
Central tendency is a single value that attempts to describe a set of data by identifying the central position within that set of data.
Pre-Requisites:
Idea about average, presentation of data, collection of data.
Activity:
There is a small unit of a factory where there are 5 employees: a supervisor and four laborers. The laborers draw a salary of Rs 5,000 per month each while the supervisor gets Rs 15,000 per month. Calculate the mean, median and mode of the salaries of this unit of the factory.
Real Life Question:
What is the average age of your class? What age do most of the students of your class have?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Mean | The mean (or average) of a number of observations is the sum of the values of all the observations divided by the total number of observations. |
| Mode | The mode is that value of the observation which occurs most frequently, i.e., an observation with the maximum frequency is called the mode. |
| Median | The median is that value of the given number of observations, which divides it into exactly two parts. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Charts & Graphs | Collect data and represent it on graphs. Find the mean, mode and median. |
Real life uses :
Psychologists use central tendency to understand the typical scores for psychological tests and evaluation tools. A management analyst is a business professional who uses central tendency to analyze the internal workings of a company.
Practical examples around us
| Examples | Explainations |
|---|---|
| Clinical Psychology | Psychologists administer drugs to their clients and compare the results to central tendency measures to determine whether the drug is effective or not. |
What you learn in Theory:
What are central tendency i.e. mean, mode and median?
What you learn in Practice:
How to find mean, mode and median for the given data?