TTEST

Returns the probability associated with a T-test. Calculates the likelihood that two samples have come from the same two underlying populations having the same mean.

Syntax

TTEST(data1; data2; mode; type)

data1: The first array or data range. Eg., A2:A6

data2: The second array or data range. Eg., B2:B6

mode: Specifies the type of distribution.

1 - one-tailed distribution

2 - two-tailed distribution

type: Determines the type of test to perform.

1 - Paired samples
2 - Two samples with equal variance (homoscedastic)

3 - Two samples with unequal variance (heteroscedastic)

Examples

Formula	Result
=TTEST(A2:A6;B2:B6;C2;D2)	0.035241998
=TTEST(A2:A6;B2:B6;C3;D3)	0.317809755
=TTEST(A2:A6;B2:B6;C4;D4)	0.316641349

Get a hands-on experience of the function in the embedded range below.

Possible Errors

Errors	Meaning
#N/A!	The function could not find the value it was asked to look for. Commonly occurs in VLOOKUP and similar functions.
#NAME!	The function name is incorrect or invalid. The given defined name (if any) is invalid. There is a typo in the defined name used in the function. Double quotes are missing for text values in the function. Colon missing in a cell range reference.
#VALUE!	The given argument's data type is incorrect or invalid. For example, the function =DATE(A1:A3) will return a #VALUE error when a text value is present in the range.
#REF!	The given cell reference is incorrect or invalid. This error may occur when a cell/range has been deleted, moved, or pasted over.
#NUM!	The number of values in data1 is not equal to data2 and type=1. The value of mode is not equal to 1 or 2. The value of type is not equal to 1, 2, or 3.

Similar Functions

ZTEST

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