If your null and alternative hypothesis are: \[ \begin{array}{l} H_{0}: \mu=81 \\ H_{1}: \mu>81 \end{array} \] Then the test is: right tailed left tailed two tailed

Step 1 ：The null hypothesis (H0) is that the mean (μ) is equal to 81. The alternative hypothesis (H1) is that the mean (μ) is greater than 81.

Step 2 ：This suggests that we are only interested in the values that are greater than 81, not less than 81.

Step 3 ：Therefore, this is a right-tailed test.

Step 4 ：Final Answer: The test is \(\boxed{\text{right tailed}}\).