Left tail at zero
| A | B | |
|---|---|---|
| 1 | t | df |
| 2 | 0 | 10 |
Formula: D2: =T.DIST(A2,B2,TRUE)
Result: 0.5
Symmetry puts half the t distribution below zero.
Google Sheets function
T.DIST in Google Sheets
T.DIST with worked examples you can test in the live grid. The argument details are in the Excel guide.
In Google Sheets
The arguments and common errors are covered in the T.DIST Excel guide; check the function help in Google Sheets for its own argument list.
Worked examples in Google Sheets
Density at zero
| A | B | |
|---|---|---|
| 1 | t | df |
| 2 | 0 | 1 |
Formula: D2: =ROUND(T.DIST(A2,B2,FALSE),4)
Result: 0.3183
With one degree of freedom the peak height is 1/pi, which is 0.31831…
Negative statistic
| A | B | |
|---|---|---|
| 1 | t | df |
| 2 | -1 | 10 |
Formula: D2: =ROUND(T.DIST(A2,B2,TRUE),4)
Result: 0.1704
About 17% of the distribution lies below t = -1 with ten degrees of freedom.
Try it
A tiny spreadsheet with example data. Edit the formula or any number and see the result.
Formula in D2: =T.DIST(-2,10,TRUE)
| A | B | C | D | |
|---|---|---|---|---|
| 1 | Number | Step | Result | |
| 2 | 1234.567 | 50 | 0.0366940173854 | |
| 3 | 17 | 5 | ||
| 4 | -4.7 | 12 | ||
| 5 | 144 | 9 | ||
| 6 | 2.5 | 3 | ||
| 7 | 50 | 12 |
Result in D2: 0.0366940173854
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