![]() If tails=1, T.TEST returns the probability of a higher value of the t-statistic under the assumption that array1 and array2 are samples from populations with the same mean. T.TEST uses the data in array1 and array2 to compute a non-negative t-statistic. ![]() If tails is any value other than 1 or 2, T.TEST returns the #NUM! error value. If tails or type is nonnumeric, T.TEST returns the #VALUE! error value. The tails and type arguments are truncated to integers. If array1 and array2 have a different number of data points, and type = 1 (paired), T.TEST returns the #N/A error value. Two-sample unequal variance (heteroscedastic) Two-sample equal variance (homoscedastic) If tails = 2, T.TEST uses the two-tailed distribution. ![]() If tails = 1, T.TEST uses the one-tailed distribution. Specifies the number of distribution tails. The T.TEST function syntax has the following arguments: Use T.TEST to determine whether two samples are likely to have come from the same two underlying populations that have the same mean. Returns the probability associated with a Student's t-Test. ![]() Excel for Microsoft 365 Excel for Microsoft 365 for Mac Excel for the web Excel 2021 Excel 2021 for Mac Excel 2019 Excel 2019 for Mac Excel 2016 Excel 2016 for Mac Excel 2013 Excel 2010 Excel for Mac 2011 Excel Starter 2010 More.
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