Average 계산기

* SD = standard deviation

Weighted average 계산기

Average calculation

The average (arithmetic mean) is equal to the sum of the n numbers divided by n:

Average =
sumcount
=
a1+a2+...+ann

Example

The average of 1,2,5 is:

Average =
1+2+53
= 2.667

Weighted average 계산기

Weight Number

Weighted average calculation

The weighted average (x) is equal to the sum of the product of the weight (wi) times the data number (xi) divided by the sum of the weights:

weighted average


Example

Find the weighted average of class grades (with equal weight) 70,70,80,80,80,90:

Since the weight of all grades are equal, we can 계산 these grades with simple average or we can count how many times each grade appears and use weighted average.

2×70,3×80,1×90

x =
2×70+3×80+1×902+3+1
=
4706
= 78.33333

Weighted average 계산기


See also

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