Returns the probability associated with t-test. Determines whether two samples are likely to have come from the same two underlying populations that have the same mean.
Sample Usage
T.TEST(A1:A4, B1:B4, 2, 1)
Syntax
T.TEST(range1, range2, tails, type)
-
range1
- The first sample of data or group of cells to consider for the t-test. -
range2
- The second sample of data or group of cells to consider for the t-test. -
tails
- Specifies the number of distribution tails.-
If
1
: uses a one-tailed distribution. -
If
2
: uses a two-tailed distribution.
-
-
type
- Specifies the type of t-Test.-
If
1
: a paired test is performed. -
If
2
: a two-sample equal variance (homoscedastic) test is performed. -
If
3
: a two-sample unequal variance (heteroscedastic) test is performed.
-
Notes
-
tails
andtype
must be numeric. -
range1
andrange2
must have the same number of data points. -
T.TEST
uses the data inrange1
andrange2
to compute a non-negative test. Iftails
is set to1
,T.TEST
returns the probability of a higher value of the t-statistic under the assumption thatrange1
andrange2
are samples from populations with the same mean. The value returned byT.TEST
whentails
is set to2
is double that returned whentails
is set to1
and corresponds to the probability of a higher absolute value of the t-statistic under the "same population means" assumption. -
You can use
TTEST
orT.TEST
to perform this function.
Examples
In this example, a paired, two-tailed t-Test is computed on a student's first and second quarter grades.