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Statistics

    Introduction

    Collection of Data

    Data Presentaion

    Measures Of Central Tendency

    Deviation in Values of Central Tendency

    Exercise 9.1

    Exercise 9.2

    What Have We Discussed

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Glossary

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Statistics > What Have We Discussed

What Have We Discussed

Representation of the data with actual observations with in a table is called 'Ungrouped Frequency Distribution Table' or 'Table of Weighted Observations'.

Representation of a large data in the form of a frequency distribution table enables us to view the data at a glance, to find the range easily, to find which observation is for how many times, to analyse and to interpret the data easily.

A measure of tendency is a typical value of the data around which other observations congregate.

Types of measure of central tendency : Mean, , Median.

is the sum observation of a data divided by the number of observations.

Mean = Sum of observations/Number of observations or x̄ = Σxin

For a ungrouped frequency distribution arithmetic mean x̄ = ΣfixiΣfi