T.TEST Function in Excel: Is the Difference Real?

⏱ 1 min readUpdated 28 September 2026

StatisticsLevel: ExpertAvailable in: Excel 2010+

In this article
  1. Syntax
  2. Examples
  3. Example 1
  4. Related functions

T.TEST returns a p-value for whether two groups have different means — did the new process really cut processing time?

Syntax

=T.TEST(array1, array2, tails, type)
Argument What it means
tails 1 or 2.
type 1 paired, 2 equal variance, 3 unequal variance.

Examples

Example 1

=T.TEST(B2:B31, C2:C31, 2, 3)

Below 0.05 usually counts as a significant difference.

CHISQ.TEST · AVERAGE

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