Same chapter3 marksDifficulty: Medium
Explain the term cumulative frequency and state how the cumulative frequency of a class is obtained.
Graphical Representation
3 marksDifficulty: Medium
State two differences between a bar graph and a histogram.
Original Khojo Papers practice question — not from a past board paper.
Answer
In a bar graph the bars are drawn with gaps between them and the width of a bar carries no meaning, because the data are for separate categories. In a histogram the bars are drawn adjacent to one another with no gaps and the area of each bar represents the frequency, because the data are grouped into continuous class intervals.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
This is why a histogram can only be drawn for continuous, exclusive class intervals.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
The marks of 40 students are grouped into class intervals of width 10. Explain how the modal class is identified from a histogram of the data.
Graphical Representation
Same chapter4 marksDifficulty: Medium
A less-than ogive is drawn for 60 observations. Explain how the median, the lower quartile and the upper quartile are read from it.
Graphical Representation
Same chapter3 marksDifficulty: Medium
What is an ogive, and what is read from the point where the two ogives of a distribution intersect?
Graphical Representation
Same chapter3 marksDifficulty: Medium
Why must class intervals be converted to their exclusive form before a histogram is drawn?
Graphical Representation
Same chapter4 marksDifficulty: Medium
For a distribution of 80 observations, state the cumulative frequencies at which the median, the lower quartile, the upper quartile and the 60th percentile are read from a less-than ogive.
Graphical Representation