Histogram: A histogram is a graphical display of data using bars of different heights. In a histogram, each bar groups numbers into ranges. Taller bars show that more data falls in that range. A histogram displays the shape and spread of continuous sample data.

Construct rough histogram of the following frequency distribution: Class-interval 0 - 10 10 - 20 Frequency 8 11

Given : Class-interval 0 - 10 10 - 20 Frequency 8 11 A histogram is a graphical display of data using bars of different heights. In a histogram, each bar groups numbers into ranges. Taller bars show that more data falls in that range. A histogram displays the shape and spread of continuous sample data. Hence, histogram of above frequency distribution is

Construct a frequency polygon of the following frequency distribution: Class-interval 10 - 20 20 - 30 Frequency 11 18

Given: Class-interval 10 - 20 20 - 30 Frequency 11 18 A frequency polygon is a graph constructed by using lines to join the midpoints of each interval, or bin. The heights of the points represent the frequencies. A frequency polygon can be created from the histogram or by calculating the midpoints of the bins from the frequency distribution table. Hence, the frequency polygon of the above data is

Construct a histogram of the following frequency distribution: Number of babies 0 1 2 Number of families 20 80 60

Given: Number of babies 0 1 2 Number of families 20 80 60 A histogram is a graphical display of data using bars of different heights. Expressing the above data in the form of continuous frequency distribution, Number of babies - 0 . 5 - 0 . 5 0 . 5 - 1 . 5 1 . 5 - 2 . 5 Number of families 20 80 60 Hence, the frequency polygon is,

The frequency distribution of 11 teachers of the Bidyasagar primary school in the Birshingha village are as follows: Age(in years) 37 - 43 43 - 49 49 - 55 Number of teachers 02 05 04 Construct a histogram of the above frequency distribution.

Given: Age(in years) 37 - 43 43 - 49 49 - 55 Number of teachers 02 05 04 A histogram is a graphical display of data using bars of different heights. In a histogram, each bar groups numbers into ranges. Taller bars show that more data falls in that range. A histogram displays the shape and spread of continuous sample data. Hence, the histogram is

The frequency distribution of the number of goals of the teams of the Kolkata league are given below: Number of goals 1 2 3 4 Frequencies 20 12 8 6 Construct a frequency polygon of the above data.

Given: Number of goals 1 2 3 4 Frequencies 20 12 8 6 A frequency polygon is a graph constructed by using lines to join the midpoints of each interval, or bin. Expressing the above data in the form of continuous frequency distribution, Number of goals 0 . 5 - 1 . 5 1 . 5 - 2 . 5 2 . 5 - 3 . 5 3 . 5 - 4 . 5 Frequencies 20 12 8 6 Hence, the frequency polygon is

Construct a frequency polygon of the following frequency distribution: Class intervals 1 - 10 11 - 20 21 - 30 Frequencies 8 3 6

Convert the given frequency distribution into a continuous grouped frequency distribution: Consider the classes 1 - 10 and 11 - 20 . The lower limit of 1 - 10 = 10 The upper limit of 11 - 20 = 11 The difference = 11 - 10 = 1 Half the difference = 1 2 = 0 . 5 So, the new class interval formed from 1 - 10 is 1 - 0 . 5 - 10 + 0 . 5 i.e., 0 . 5 - 10 . 5 Continuous classes formed are: Class intervals 0 . 5 - 10 . 5 10 . 5 - 20 . 5 20 . 5 - 30 . 5 Frequencies 8 3 6 Hence, the frequency polygon is as follows

The marks obtained by 40 students in an examination of 100 marks are given below. Marks obtained 40 - 60 60 - 80 80 - 100 Number of students 10 20 10 Construct at first histogram and then frequency polygon in the same sheet.

Given: Marks obtained 40 - 60 60 - 80 80 - 100 Number of students 10 20 10 A frequency polygon is a graph constructed by using lines to join the midpoints of each interval or bin of the histogram. Hence, the histogram and frequency polygon is as follows,