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This function returns the result of an F-test, which returns the one-tailed probability that the variances in two arrays are not significantly different.
FTEST( array1, array2 )
The arguments may be arrays of values.
Accepts arrays of numeric data for both arguments. Returns numeric data.
FTEST(A1:D34,A35:D68)
FTEST(R1C1:R34C4,R35C1:R68C4)