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

TTEST(A1:A4, B1:B4, 2, 1)

Syntax

TTEST(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 and type must be numeric.

range1 and range2 must have the same number of data points.

TTEST uses the data in range1 and range2 to compute a non-negative test. If tails is set to 1, TTEST returns the probability of a higher value of the t-statistic under the assumption that range1 and range2 are samples from populations with the same mean. The value returned by TTEST when tails is set to 2 is double that returned whentails is set to 1 and corresponds to the probability of a higher absolute value of the t-statistic under the "same population means" assumption.

In order to use the TTEST formula, start with your edited Excellentable:

Then type in the TTEST formula in the area you would like to display the outcome:

By adding the values you would like to calculate the TTEST formula for, Excellentable will generate the outcome:

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