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Statistical function
T.DIST.2T
Returns the two-tailed Student t distribution.
Rarely usedDifficulty 1500 · AdvancedUsage rank #410 of 520
When to use it
The two-tailed p-value for a t statistic: the probability of a value at least as extreme in either direction.
The shape of it
- Syntax
=T.DIST.2T(x, deg_freedom)
Worked examples
p-value
=T.DIST.2T(2,10) → 0.073388
Not quite significant at 5%.
Critical value check
=T.DIST.2T(2.228,10) → 0.05
The 5% critical value on 10 degrees of freedom.
Small statistic
=T.DIST.2T(1,5) → 0.363217
A small t on few degrees of freedom.
Worth knowing
- Coefficient p-values in a regression: T.DIST.2T(ABS(coef/se),n-k-1).
- x must be non-negative; wrap in ABS.
- Replaces TDIST with tails 2.
Where it goes wrong
- #NUM! for negative x.
- Degrees of freedom are truncated.
Related
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