What is an arithmetic mean? How can it be computed in the case of ungrouped as well
as grouped data? Illustrate with the help of hypothetical data.
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Solution: Definition of Arithmetic mean: Arithmetic mean is measure of central tendency.It is calculated by adding all the data together divided by total number of data or observation.
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the mean is assumed on the basis of logic and or general observation. This is usually the centrally located value in the data set. The calculate the deviation of all values from the mean, add up all the deviations and divide this sum by the number of observations, and add this value to the assumed mean. Xˉ=A+N∑d.
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