Frequency & Frequency Distribution

                                                  FFrequency& Frequency Distribution

It tells how often something happened.The frequency of an observation tells you the number of times observation occur in the data. For e.g, the frequency of number  5 is 4. ,5,2,5,6,5,2,4,5,8,5.

Frequency Distribution:

It is representation of data or you can say observation within the given interval.

Example: Newspapers

These are the numbers of newspapers sold at a local shop over the last 10 days:

22, 20, 18, 23, 20, 25, 22, 20, 18, 20

Let us count how many of each number there is:

Papers Sold	Frequency
18	2
19	0
20	4
21	0
22	2
23	1
24	0
25	1

Papers Sold	Frequency
15-19	2
20-24	7
25-29	1

Grouped Frequency Data:

When the data is sorted and classified into classes, then it is called as Grouped frequency data.

For e.g. you can refer to this: https://www.statisticshowto.com/grouped-data/.