1 A public health worker suspects that pipes in one of the o

1.      A public health worker suspects that pipes in one of the older A&M dorms is causing students living there to have excess lead in their blood, i.e., over 100ppb (parts per billion). What set of hypotheses should they test to insure the health of the students in the dorm?

A.      H₀: 100 vs. H_A: > 100

B.     H₀: 100 vs. H_A: < 100

C.     H₀: = 100 vs. H_A: =100

D.     H₀: < 100 vs. H_A: 100

E.     H₀: > 100 vs. H_A: 100

Solution

look for strict inequality in alternative hypothesis (over 100ppb), correct option is:

A.      H0: 100 vs. HA: > 100