What is a histogram?
A histogram is a plot with the help of which we can know about the distribution pattern of collected data. When we plot the data in histogram it shows the data in bins (a particular range of data).
With the help of which we can understand the where is our collected data is getting distributed.
Histogram represent the data in mainly normal, non-normal distribution.
By plotting the data in histogram we can identify the outliers, skewness present in data.
It is used to plot continuous data
Steps to draw Histogram:
Step-1
Collect the data as per requirement
Collected 30 parts data from a process.
111,115,117,121,126,128,134,135,134,136,139,142,143,144,144,145,152,151,151,156,154,167,164,164,163, 174,176,184,189,194.
Step-2
Arrange the data in range groups
111,115,117,121,126,128,134,135,134,136,139,142,143,144,144,145,152,151,151,156,154,167,164,164,163, 174,176,184,189,194.
Step 3
Check the range of data
100~200
Step-4
Now define the interval with respect to collected data
|
110-120 |
120-130 |
130-140 |
140-150 |
150-160 |
160-170 |
170-180 |
180-190 |
190-200 |
Step-5
Calculate the frequency of data with respect to identified intervals
| Bin |
Frequency |
|
110-120 |
3 |
|
120-130 |
3 |
|
130-140 |
5 |
|
140-150 |
5 |
|
150-160 |
5 |
|
160-170 |
4 |
|
170-180 |
2 |
|
180-190 |
2 |
|
190-200 |
1 |
Step-5
Arrange the data in identified intervals
|
Bin interval |
Frequency of data |
Data in Bin |
|
110-120 |
3 |
111, 115,117 |
|
120-130 |
3 |
121,126,128 |
|
130-140 |
5 |
134,135,134,136,139 |
|
140-150 |
5 |
142,143,144,144,145 |
|
150-160 |
5 |
152,151,151,156,154 |
|
160-170 |
4 |
167,164,164,163 |
|
170-180 |
2 |
174,176 |
|
180-190 |
2 |
184,189 |
|
190-200 |
1 |
194 |
Step-6
Select the graph and put data in graph
What is Histogram? Steps to create it
