A null and alternative hypothesis are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed.
: µ ≤ 13
:µ > 13
Solution
If the alternative hypothesis contain the not-equal-to inequality symbol, then it is a two-tailed test. If the alternative hypothesis contain the less-than inequality symbol, then it is a left-tailed test. If the alternative hypothesis contain the greater-then inequality symbol, then it is a right-tailed test.
Since the alternative hypothesis , has a greater-than inequality symbol, the hypothesis test is a right-tailed test.