WorksheetFunction.T_Dist_RT Method (Excel)
Returns the right-tailed Student t-distribution where a numeric value (x) is a calculated value of t for which the Percentage Points are to be computed. The t-distribution is used in the hypothesis testing of small sample data sets. Use this function in place of a table of critical values for the t-distribution.
Version Information
Version Added: Excel 2010
Syntax
expression .T_Dist_RT(Arg1, Arg2)
expression A variable that represents a WorksheetFunction object.
Parameters
Name |
Required/Optional |
Data Type |
Description |
|---|---|---|---|
Arg1 |
Required |
Double |
X - The numeric value at which to evaluate the distribution. |
Arg2 |
Required |
Double |
Degrees_freedom - An integer that indicates the number of degrees of freedom. |
Return Value
Double
Remarks
If any argument is non-numeric, T_DIST_RT returns the #VALUE! error value.
If degrees_freedom < 1, T_DIST_RT returns the #NUM! error value.
The degrees_freedom and tails arguments are truncated to integers.
If tails is any value other than 1 or 2, T_DIST_RT returns the #NUM! error value.
If x < 0, then T_DIST_RT returns the #NUM! error value.
If tails = 1, T_DIST_RT is calculated as T_DIST_RT = P( X>x ), where X is a random variable that follows the t-distribution. If tails = 2, T_DIST_RT is calculated as T_DIST_RT = P(|X| > x) = P(X > x or X < -x).
Because x < 0 is not allowed, to use T_DIST_RT when x < 0, note that T_DIST_RT(-x,df) = 1 – T_DIST_RT(x,df) = P(X > -x) and T_DIST_2T(-x,df) = T_DIST_2T(x df) = P(|X| > x).