Krishna
1

Step 1: Definition of histogram

A histogram is a type of graph that is used in statistics. Histograms are similar to bar charts they are a way to display counts of data. The heights of the bars indicate the frequencies or relative frequencies of values in our data set.

Step 2: Make a frequency distribution table for the given data.

GIVEN DATA: 1.45 2.20, 0.75, 1.23, 1.25, 1.25, 3.09, 1.99, 2.00, 0.78, 1.32, 2.25, 3.15, 3.85, 0.52, 0.99, 1.38, 1.75, 1.22, 1.75.

Skill 1:  Divide this into intervals(bins or classes) of equal length:

Example:   0.50 - 0.99, 1.00 - 1.49, 1.50 - 1.99, 2.00 - 2.49,

2.50 - 2.99, 3.00 - 3.49, and 3.50 - 3.99

Skill 2: Count the number of data points which fall into each interval

Frequency distribution table

0.50  - 0.99      4     (0.52, 0.75, 0.78, 0.99)

1.00  - 1.49      7

1.50  - 1.99      3

2.00  -  2.49     3

2.50  -  2.99     3

3.00  -  3.49     2

3.50  -  3.99     1

total          20

Step 3: Choose a scale for the axis that will accommodate the class and frequency

Step 4: Construct bars for each class. The height of each bar should correspond to the frequency of the class at the base of the bar.