CONFIDENCE.T

CONFIDENCE.T(alpha, standard_dev, size)

Returns the confidence interval for a population mean using a t distribution.

alpha	The significance level.
standard_dev	The standard deviation for the population.
size	The size of the sample.

REMARKS

* The confidence level is 100*(1-alpha)%
* An alpa of 0.05 indicates 95% confidence leve.
* If "size" = 1, then #DIV! is returned.
* If "size is not an integer, it is truncated.
* If "standard_dev" <=0, then #NUM! is returned.
* If "alpha" <=0, then #NUM! is returned.
* If "alpha >=1, then #NUM! is returned.
* This function was added in Excel 2010
* For the Microsoft documentation refer to support.microsoft.com

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