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
What is an ogive, and what is read from the point where the two ogives of a distribution intersect?
Original Khojo Papers practice question — not from a past board paper.
Answer
An ogive is a cumulative frequency curve, drawn by plotting the cumulative frequency against the upper class boundary for a less-than ogive, or against the lower class boundary for a more-than ogive. The x-coordinate of the point where the two ogives meet is the median of the distribution.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The median can also be read from a single less-than ogive at the cumulative frequency n/2.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
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A less-than ogive is drawn for 60 observations. Explain how the median, the lower quartile and the upper quartile are read from it.
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State two differences between a bar graph and a histogram.
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Why must class intervals be converted to their exclusive form before a histogram is drawn?
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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.
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