While computing mean of grouped data, we assume that the frequencies are:

evenly distributed over all the class

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centred at the classmarks of the class

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centred at the upper limits of the class

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centred at the lower limits of the class

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Solution

The correct option is B centred at the classmarks of the class
While computing mean of grouped data, we assume that the frequencies are centred at the class marks of the class.
Hence, option B is correct.

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Similar questions

Q. Question 2
While computing mean of grouped data, we assume that the frequencies are
(a) evenly distributed over all the classes
(b) centred at the class marks of the classes
(c) centred at the upper limits of the classes
(d) centred at the lower limits of the classes

If the classes in a grouped frequency distribution are not continuous, we can make them continuous by finding half of the difference between the upper limit of a class and the lower limit of the next class, and then adding the same to all the lower limits and subtracting it from all the upper limits in the distribution.

State true or false.

If the classes in a grouped frequency distribution are not continuous, we can make them continuous by finding the difference between the upper limit of a class and the lower limit of the next class, and then adding half of the difference to all the lower limits and subtract it from all the upper limits in the distribution.

Q. 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) upper limits of the classes
(b) lower limits of the classes
(c) class marks of the classes
(d) upper limits of preceding classes

Q. Question 22
For drawing a frequency polygon of a continuous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abcissae are, respectively:

A) Upper limits of the classes
B) Lower limits of the classes
C) Class marks of the classes
D) Upper limits of preceding classes

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While computing mean of grouped data, we assume that the frequencies are:

The correct option is B centred at the classmarks of the classWhile computing mean of grouped data, we assume that the frequencies are centred at the class marks of the class.Hence, option B is correct.

The correct option is B centred at the classmarks of the class
While computing mean of grouped data, we assume that the frequencies are centred at the class marks of the class.
Hence, option B is correct.