How to calculate standard deviation for ungrouped data?
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Answered by
1
Discrete variables
Calculate the mean.
Subtract the mean from each observation.
Square each of the resulting observations.
Add these squared results together.
Divide this total by the number of observations (variance, S2).
Use the positive square root (standard deviation, S).
Calculate the mean.
Subtract the mean from each observation.
Square each of the resulting observations.
Add these squared results together.
Divide this total by the number of observations (variance, S2).
Use the positive square root (standard deviation, S).
Answered by
1
It's very easy
First arrange the data in ascending order.
Then, find the mean of the data.
Once you find the mean X, then use the formula a-X where a is the observation
Alternatively use Sigma(xi-X) formula for easy calculation.
First arrange the data in ascending order.
Then, find the mean of the data.
Once you find the mean X, then use the formula a-X where a is the observation
Alternatively use Sigma(xi-X) formula for easy calculation.
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