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Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose?
Asked by Meenakshisundarams Last Modified
Answer 
Abhay
It can be observed that class intervals are not continuous. There is a gap of 1 between two class intervals. Therefore,
has to be added to the upper class limit and has to be subtracted from the lower class limit of each interval.
Class mark (xi) can be obtained by using the following relation.
Class size (h) of this data = 3
Taking 57 as assumed mean (a), di, ui, fiui are calculated as follows.
It can be observed that
Mean number of mangoes kept in a packing box is 57.19.
Step deviation method is used here as the values of fi, di are big and also, there is a common multiple between all di.
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