I have been given a formula for calculating a t test statistic as <br>

$t_{n-1} = \frac{ \bar{x}- \mu_0}{\frac{S}{\sqrt{n}}} $<br>

Where $\bar{x}$ is the sample mean, $\mu_0$ is the hypothetical true mean, $S$ is the sample standard deviation and $n$ is the sample count..

But when I plug my values in the outcome is negative.<br>
I don't see how to look up a negative value on the T-table.<br>
Should I be taking the absolute value?