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The T Test Calculator to calculate the significance of observed differences between the means of two samples.
where
x̄2 is the mean of first data set
x̄1 is the mean of first data set
S22 is the standard deviation of first data set
S12 is the standard deviation of first data set
N2 is the number of elements in the first data set
N1 is the number of elements in the first data set
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