Question

practice e11
score: 8/14 answered: 4/7
question 5
if your null and alternative hypothesis are:
$h_0: \mu = 81$
$h_1: \mu \
eq 81$
then the test is:
two tailed
left tailed
right tailed

Explanation:

A two - tailed test is used when the alternative hypothesis \(H_1:\mu
eq\mu_0\) (in this case \(\mu_0 = 81\)). The rejection region is in both tails of the sampling distribution. A left - tailed test has \(H_1:\mu<\mu_0\) and a right - tailed test has \(H_1:\mu>\mu_0\). Since our \(H_1\) is \(\mu
eq81\), it is a two - tailed test.

Answer:

two tailed