The answer choices below represent different hypothesis tests. which of the choices are left-tailed tests? select all correct answers. select all that apply:
a) h0: x=17.3, ha: x≠17.3
b) h0: x=19.7, ha: x< 19.7
c) h0: x=11.2, ha: x< 11.2
d) h0: x=13.2, ha: x≠13.2
e) h0: x=17.8, ha: x> 17.8

Step-by-step explanation:

We know that the type of hypothesis test depends upon the nature of alternative hypothesis . If the alternative hypothesis is left-tailed then the test is also left-tailed.

Similarly for right tailed and two tailed hypothesis.

From the given options , the set of hypothesis with left-tailed alternative hypothesis are :-

Therefore , in choices B) and C) , the hypothesis test is left-tailed test.