The total number of observations, which are below a certain value are known as
A
class boundaries
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B
class marks
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C
Cumulative frequency
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D
Variances
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Solution
The correct option is C Cumulative frequency The cumulative frequency is the total of frequencies, in which the frequency of the first class interval is added to frequency of the second class interval and then the sum is added to the frequency of the third class interval and so on.