Question

1. To test for the effectiveness of Hydroxychloroquine on preventing COVID-19 symptoms, University of Michigan is conducting a clinical trial. They are recruiting people by asking those who are healthcare workers and have had a high exposure to the disease to contact them to be enrolled in the study. They ultimate receive 10500 responses. Which option best characterizes this sample?

Select one:

a. Voluntary response sample 0

b. Simple random sample 0

c. Cluster sample 0

d. Systematic random sample 0

2.

Which of the following are reasonable pairs of hypotheses (null and alternative) for a hypothesis test for a proportion?

Select one or more:

a. H0:p>0.01H0:p>0.01 vs. HA:p=0.01HA:p=0.01

b. H0:p=0.5H0:p=0.5 vs. HA:p<0.75HA:p<0.75

c. H0:p=−0.1H0:p=−0.1 vs. HA:p≠−0.1HA:p≠−0.1

d. H0:p=23H0:p=23 vs. HA:p>23HA:p>23

e. H0:p=0.25H0:p=0.25 vs. HA:p≠0.25HA:p≠0.25

f. H0:p=1.2H0:p=1.2 vs. HA:p<1.2HA:p<1.2

g. H0:p̂ =0.8H0:p^=0.8 vs. HA:p̂ ≠0.8

Answer 1

From the given information,

The required correct answers are,

1. Voluntary response sample

i.e., Option a. is correct.

2. There is only one appropriate pair of hypothesis,

H0:p=0.25 vs. HA:p≠0.25

i.e., Option e. is correct.

Thank you.