. While computing mean of grouped data

, we assume that the frequencies are:

A: evenly distributed over all the class

B: centred at the classmarks of the class

C: centred at the upper limits of the class

D: centred at the lower limits of the class


Best Answer


  • Grouped data is data that has been grouped in categories. 
  • Mean of a set of observations is the average of the given observations. 
  • To find the mean, we divide the sum of the observations by the total number of observations.
  • While estimating the mean of grouped data, we assume the frequencies are centered at the classmark of the class.

Final Answer

Hence, the correct answer is option B: centred at the classmarks of the class


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