Function: tToZ()

function tToZ(t, df): number;

Defined in: src/utils/statistics.ts:323

Converts a t-statistic to an approximate z-score.

For large degrees of freedom (df > 30), uses a simple approximation: z = ((1 - 1/(4df)) * t) / sqrt(1 + tt/(2*df))

For smaller df, uses a Wilson-Hilferty cube-root transformation.

Time complexity: O(1)

Parameters

t

number

t-statistic value

df

number

Degrees of freedom

Returns

number

Approximate z-score

Throws

If df < 1