PTTEST

**Syntax:** **PTTEST( R1, R2)**

*R1* = a range

*R2* = a range

**PTTEST** returns the significance level (alpha) of the
two-sided paired T-test for the paired samples contained
in ranges *R1* and *R2*, respectively. Then alpha is the
probability of error in rejecting the null hypothesis
that mean [**y-x**]=0. *R1* and *R2* must have the same
dimension.

**Examples:**

**PTTEST**(A1..A4, B1..B4) = 0.64, where A1..A4 = .5, .98,
.22, .1, and B1..B4 = .87, .6, .21, .49.

**PTTEST**(H5..H9, K5..K9) = 0.0008594, where H5..H9 = 14,
35, 37, 0, 33, and K5..K9 = 67, 77, 94, 34, 99.

**PTTEST**(A1..A30, B1..B50) = Error - ranges must be same dimension

**Excel function:** *N/A*

Grey Trout Software

02 March 2003