A simple introduction to what is data and what we learn in statistics is given with an example.

*click on the content to continue..*

*Numbers are used to represent measures or count.*

Example: The length of a pencil is `15`cm.

Consider a class of `20` students.

The heights of the students are measured.

The heights usually vary and are NOT just one number.

The height values of eight students are given below in centimeters.

`90`, `86`, `99`, `91`, `87`, `92`, `90`, `90`.

The collection of information is called "**data**".

The word "data" means: collection of numbers given as measure or count of a quantity in different cases.

*familiarize with the terminology *

data

On a plate, oranges, apples, bananas, and mangoes were available. A group of students take one fruit each as given in the order below.

orange

apple

mango

mango

apple

orange

banana

mango

mango

mango

This is another form of data. This is represented as number of student taking a particular fruit.

*In a plate, oranges, apples, bananas, and mangoes were available. A group of students take one fruit each as given in the order below. orange apple mango mango apple orange banana mango mango mango* Is it easy to understand the data in this form? If the number of students is increased to `50`, then the data, in this form, will not be easy to manage.

*In a plate, oranges, apples, bananas, and mangoes were available. A group of students take one fruit each as given in the order below. orange apple mango mango apple orange banana mango mango mango* The data is given as

`2` students took oranges

`2` students took apples

`5` students took mangoes

`1` student took banana

The representation given above is easier to read and understand.

The topic you are reading now is called "Statistics". Statistics is about collection, representation, and analyzing data.

The word "statistics", means collection, representation, and analyzing data.

In early days, "Statistics" was the data about *a state (a country)* and the word-form based of "state" is still in use.

*familiarize with the terminology *

statistics

**Data** : Collection of information is data.**Statistics** : Study of recording, representing, and analyzing data.

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