TINV

Calculates the inverse of the two-tailed TDIST function.

Syntax:

TINV(p, r)

returns the value x, such that TDIST(x, r, 2) is p.

r (degrees of freedom) is an integer >=1.

p (probability) must be >=0 and <=1.

To calculate the inverse of the one-tailed TDIST function, use TINV(p*2, r), which returns the value x, such that TDIST(x, r, 1) is p.

Example:

TINV(0.666, 2)

returns approximately 0.50.