Mathematics for IGCSE & O level - Statistical Diagrams (Section 3 - No. 44)
In a histogram, if the class intervals have equal widths, then which of the following is true?
Frequency is directly proportional to the height of the bars.
Frequency density is directly proportional to the width of the bars.
Area is directly proportional to frequency density.
The median can be calculated.
Explication
When intervals are equal width, height is directly proportional to frequency.