Desktop User Guides > Reporter > Applying statistical tests > Column means test > Statistical formula for the Least Significant Difference test
 
Statistical formula for the Least Significant Difference test
The formula for the least significant difference value for independent values is as follows:
Notation
Description
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Weighted count of cases contributing to the mean in column i.
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Weighted sum of the values in column i.
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Weighted sum of the squared values in column i.
NCOL
The number of columns in the group.
The degrees of freedom are:
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and the LSD value is:
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where MS is the mean square:
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HM is the harmonic mean:
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and SIGVAL is the critical value of T for DOF degrees of freedom at the significance level defined by the user.
See also
Column means test