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
3 marksDifficulty: Medium
Why is an ogive always a rising curve?
Original Khojo Papers practice question — not from a past board paper.
Answer
An ogive plots cumulative frequency, and cumulative frequency can never decrease as the variable increases: each class adds its own frequency, which is zero or more, to the running total.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A less-than ogive therefore rises from zero to the total frequency.
Related questions
From the same topic and chapter, at a similar level.
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Why must class intervals be converted to their exclusive form before a histogram is drawn?
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State two differences between a bar graph and a histogram.
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What is an ogive, and what is read from the point where the two ogives of a distribution intersect?
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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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Same chapter3 marksDifficulty: Medium
Explain the term cumulative frequency and state how the cumulative frequency of a class is obtained.
Graphical Representation