Suppose a research team is investigating whether a new drug treatment results in a mean recovery time different from the standard mean recovery time of $\mu_0 = 14$ days. They use a test statistic $T$ such that under the null hypothesis $H_0: \mu = \mu_0$, $T \sim t_{12}$. If they calculate $T = -2.15$, what is the correct interpretation of the $p$-value associated with a two-tailed test?