Question

In each of Exercises 9.41-9.46 ,determine the critical values for a one-mean z-test. For each exercise, draw a graph that illustrates your answer

A left-tailed test with$\alpha =0.05$

Short answer

A left-tailed test with $\alpha =0.05$.

In the left tail test that $\alpha =0.05$, from normal local tables values are significant
$z_0=-1.645$.

Step-by-step solution

Step 1. Given 

A left-tailed test with$\alpha =0.05$

Step 2. Graph 

A left-tailed test with $\alpha =0.05$.

in the left tail test that $\alpha =0.05$, from normal local tables values are significant $z_0=-1.645$.

The graph is shown below :