Question

What is the math definition of mean?​

Answer 1

Answer: There are several kinds of mean in mathematics, especially in statistics. For a data set, the arithmetic mean, also known as arithmetic average, is a central value of a finite set of numbers: specifically, the sum of the values divided by the number of values.

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Answer 2

Mean is the number obtained by dividing the sum of all the items by the number of items.

i.e,mean= sum of all the items/the number of items

i. Mean of non-repeated data

If X represents all the items and n be the number of items,then

mean= summationX/N

ii. Mean of individual repeated data(Mean of a frequency distribution)

In the case of repeated data,follow the steps given below to calculate the mean.

- Draw a table with 3 columns.

-Write down the items(X) in ascending or descending order in the first column and the corresponding frequencies in the second column.

-Find the product of each item and it's frequency(fx) and write in the third column.

- Find the total of f column and FX column.

- Divide the sum of FX by the sum of f(total number of items),the quotient is the required mean.

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