For drawing a frequency polygon of a continuous frequency distribution,we plot the points whose ordinates are the frequencies of the respective classes and abscissae are respectively:

  • A
    class marks of the classes
  • B
    lower limits of the classes
  • C
    upper limits of the classes
  • D
    upper limits of preceding classes

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Similar Questions

Convert the given frequency distribution into a continuous grouped frequency distribution:
Class interval Frequency
$150-153$ $7$
$154-157$ $7$
$158-161$ $15$
$162-165$ $10$
$166-169$ $5$
$170-173$ $6$

In which intervals would $153.5$ and $157.5$ be included?

The mean of $10$ observations is $52$. If $12$ is subtracted from each observation,then the mean of the new observations so obtained is:

The class mark of the class $70-90$ is ...........

Classifying the observations $0, 3, 2, 5, 7, 8, 10, 12, 5, 6, 6, 4, 14, 18, 20$ of a data,the frequency of class $0-5$ is ........

The mean of the data: $2, 8, 6, 5, 4, 5, 6, 3, 6, 4, 9, 1, 5, 6, 5$ is given to be $5$. Based on this information,is it correct to say that the mean of the data: $10, 12, 10, 2, 18, 8, 12, 6, 12, 10, 8, 10, 12, 16, 4$ is $10$? Give reason.

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