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  • 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 classe

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

Answers (1)

Answer.          [B]
Solution.    Mean: It is the average of the given numbers/observations. It is easy to calculate mean. First of all, add up all the observations and then divide by the total number of observations.
Hence while computing mean of grouped data, we assume that the frequencies are centered at the class marks of the classes                                                                                     

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