Cumulative frequency for a class interval represents:
A. The average frequency across all classes
B. The sum of frequencies of all classes up to and including that class
C. The frequency of that class only
D. The difference between the upper and lower class limits
Answer: Option B
Solution (By JKSSB Mock Tests)
Cumulative frequency is the running total of frequencies, calculated by adding the frequency of each class to the sum of frequencies of all preceding classes, useful for percentile calculations.
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