Class 8 Maths Data Handling Frequency

Frequency

In a collection of data, the number of times a particular entry is occurring denotes the frequency of that entry.

A frequency distribution table represents the frequency of each entry in a collection of data.

For example, in a class if there are 15 students and their favorite subjects are Maths, English, Maths, Science, English, Maths, Hindi, Hindi, Maths, English, Maths, English, Maths, Hindi, Maths. Frequency distribution table can be drawn as:

Subject

Tally Marks

Number of Students (Frequency)

Maths

|||| ||

7

English

||||

4

Science

|

1

Hindi

|||

3

 

Problem: The shoppers who come to a departmental store are marked as: man (M), woman (W), boy (B) or girl (G).

The following list gives the shoppers who came during the first hour in the morning. W WW G B W W M G G M M W WWW G B M W B G G M W W M M W WW M W B W G M W WWW G W M M W M W G W M G W M M B G G W.

Make a frequency distribution table using tally marks. Draw a bar graph to illustrate it.

Solution:

Customer

Tally Marks

Frequency

W

|||||||||||||||||||||||

28

M

||||||||||||

15

B

||||

5

G

|||||||| ||

12

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