bar diagrams
Treatment of Employee’s Job Status
The student now examines job status. This section is different from the previous ones because in this case the order of values is significant. The junior rank is the lowest, then the intermediate rank, while the senior rank is the highest. Because this order is significant, we will construct the frequency table so that the values of the job status variable appear in their correct order, which is usually from the lowest to the highest.
Value (Job Status) 
Frequency 
Relative Frequency 
Junior rank 
17 
57% 
Intermediate rank 
8 
27% 
High (senior) rank 
5 
16% 
Total 
30 
100% 
Since the order is significant, we can place the variable values on the horizontal axis in their correct order to form a bar diagram.
diagram
In a bar diagram, the values appear on the horizontal axis in order from lowest to highest. The vertical axis represents the frequency axis. Every value on the horizontal axis corresponds to a bar whose height is the frequency of that value.
For example, the height of the bar that represents the junior rank is 17 because there are 17 employees with junior rank. The bar diagram can be presented according to relative frequencies.
The resulting picture will be almost identical, i.e., only the values on the vertical axis will be different.
Joint Presentation of Gender and Job Status
Just as we presented a joint table and graphic representation above by combining the gender section with the marital status section, we will present a table combining the job status section with the gender section.
Value (Job Status) 
Frequency 

Male 
Female 
Total 

Junior rank 
4 
13 
17 
Intermediate rank 
2 
6 
8 
High (senior) rank 
2 
3 
5 
Total 
8 
22 
30 
We can draw a bar diagram for job status with females and males shown separately in two different ways. The bars can be shown next to each other. This method highlights the contrast between them. We can also draw the bars on top of each other, which stresses their sum more effectively, as appears in the diagram.
Diagram