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While computing mean of grouped data, we...

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

A

evenly distributed over the classes

B

centred at the class marks of the classes

C

centred at the lower limits of the classes

D

centred at the upper limits of the classes

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In computing the mean of the grouped data , we assume that the frequencies are centred at the class marks of the classes
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In Calculating the mean of grouped data, grouped in classes of equal width, we may use the formula bar(x)=a+(sumf_(i)d_(i))/(sumf_(i)) Where, a is the assumed mean, a must be one of the mid point of the classes. Is the last statement correct? Justify your answer.

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RS AGGARWAL-MEAN,MEDAN,MODE OF GROUPED,DATA CUMULATIVE FREQUENCY GRAPH AND OGIVE -Multiple Choice Questions (Mcq)
  1. The mode of a frequency distribution is obtained graphically from

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  2. The median of a frequency distribution is found graphically with the h...

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  3. The cumulative frequency table is useful in determining the

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  4. The abscissa of the point of intersection of the Less Than Type and of...

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  5. If x(i)'s are the mid-points of the class intervals of grouped data, f...

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  6. In the formula bar(x)=a+h(sumf(i)u(i))/(sumf(i)) for finding the mea...

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  7. In the formula bar(x)=a+(sumf(i)d(i))/(sumf(i)) for finding the mean...

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  8. While computing mean of grouped data, we assume that the frequecies ar...

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  9. The relation between mean, mode and median is

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  10. If the 'less than type' ogive and 'more than type' ogive intersect eac...

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  11. MODE - Definition and How to calculate MODE of Distribution.

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  12. Median=

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  13. If the mean and median of a set of numbers are 8.9 and 9 respectively...

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  14. The mean and mode of a frequency distribution are 28 and 16 respective...

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  15. The median and mode of a frequency distribution are 26 and 29 respect...

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  16. For a symmetrical frequency distribution , we have

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  17. The median of first 8 prime numbers is

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  18. The average of 20 numbers is zero. Of them, at the most how many may b...

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  19. If the median of the data 4,7,x-1,x-3,16,25, written in ascending orde...

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  20. The mean of 2,7,6 and x is 5 and the mean of 18,1,6,x and y is 10 What...

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