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

Answer

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Answer

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

Steps

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 \(\boxed{\text{right tailed}}\).