Ogive interpretation
An ogive is a cumulative frequency graph used to interpret grouped data and locate values such as the median.
Practice This ConceptMain explanation
Teacher explanation
An ogive is drawn from cumulative frequencies, usually less-than cumulative frequencies. Its shape helps us read positions like median and compare the spread of data. When the curve is drawn carefully, it gives a clear visual summary of the distribution.
Example
If the cumulative frequencies rise steadily and then flatten, the ogive shows how the data is distributed across classes.
Simple analogy
Ogive means cumulative curve, not frequency bars.
Common confusion
Students often plot ordinary frequencies on an ogive instead of cumulative frequencies.
Exam tip
For an ogive, always plot cumulative frequency against class boundary, not class mark.
Answer writing and exam use
1-mark use
Write the exact meaning of ogive interpretation in one clean line.
2-mark use
Define ogive interpretation and add one example or condition.
3-mark use
Explain ogive interpretation, show the method or example, and mention the common mistake.
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