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Collection of online calculators which will help you to solve mathematical problems with their step by step solution at just a mouse click.
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Statistical Methods calculators
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Combined Mean and Standard deviation calculator
1. Find Combined Mean and Standard deviation
1. N,
X
, Standard Deviation
2. N,
S
X, Variance
1
2
3
N
X
SD
1
2
3
N
S
X
Variance
2. Combined Mean
X
_{12}
=
,
X
_{1}
=
, N
_{1}
=
, N
_{2}
=
, find
X
_{2}
Solution
Help
Example1
Example2
Solution
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Find Combined Mean and Standard deviation
1. Find the combined Standard Deviation from the following data.
A
B
No of Observations
40
60
Average
10
15
S.D.
1
2
2. Find the combined Standard Deviation from the following data.
A
B
No of Observations
100
150
Average
250
420
S.D.
10
6.4
3. Find the combined Standard Deviation from the following data.
A
B
No of Observations
100
150
S
X
25000
42000
Variance
100
40.96
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