Final answer:
If the obtained t-test value is equal to or higher than the critical value, it means that we reject the null hypothesis.
Step-by-step explanation:
If the obtained t-test value is equal to or higher than the critical value, it means that the test statistic falls in the critical region and we reject the null hypothesis. In other words, we have enough evidence to support the alternative hypothesis. For example, if the critical t-value is 1.833 and the t-test value is 1.98, since 1.98 is greater than 1.833, we would reject the null hypothesis.