Answer:
The test Joe should do is a Left-tailed test
Step-by-step explanation:
From the question we are told that
The null hypothesis is [tex]H_o : \mu = 37[/tex]
The alternative is [tex]H_a : \mu < 37[/tex]
Here looking at the alternative hypothesis we see that [tex]\mu < 37[/tex] , this tell us that the test is a Left-tailed test , it tell us that the value we are considering is at left side of the area under the normal curve
