Question

In order to compare two bar graphs, which of the following is/are true?

• A. Number of samples being compared must be equal
• B. Scale of both the graphs may or may not be same
• C. Number of samples being compared may or may not be equal
• D. Scale of both the graphs must be same

Answer 1

Answer: (A), (D)

The correct options are
A

Number of samples being compared must be equal

D

Scale of both the graphs must be same

The sample space should be same because if they are different, the comparison would be irrelevant. Also, the scale of bar graphs should also be same. Different scales could lead to a false illusion of smaller quantity being larger. So, here answer options A and D are correct.