8.5.11.71. xz_test

xz_test(array, x, sigma=None)

Z.TEST(array, x, [sigma]) -> one-tailed p-value

• If sigma is omitted/empty, use sample stdev (ddof=1).

• Returns #N/A if no numeric data (or n<2 when sigma omitted).

• Returns #DIV/0! if sigma <= 0 (or sample stdev is 0).