Investment Studio > Expressions > Functions > Statistical > FTEST

float ftest(float array a, float array b)

Returns the probability that the variances of the two populations sampled in arrays a and b are not significantly different.

The arrays must contain at least two elements each, and their sample variance must not be zero.

All array elements are converted to float, with exclusion if conversion fails.

Example

=ftest({9, 47, 6, 2, 8, 4}, {50, 34, 66, 34, 68, 34})

» 91.9%.

See also chitest, fdist, finv, ttest, ztest.