Question

A student wondered if more than​ 10% of students enrolled in an introductory Chemistry class dropped before the midterm. He noticed that 2 out of 15 of his friends in the class dropped before the midterm. Based on his​ sample, he performed a hypothesis test. Is the hypothesis test a​ one-tailed or​ two-tailed test?

Choose the correct answer below.
A.It is a​ two-tailed test since the null hypothesis states that the parameter is not equal to the hypothesized valued.
B.It is a​ two-tailed test since the alternative hypothesis states that the parameter is not equal to the hypothesized value.
C.It is a​ one-tailed test since the alternative hypothesis states that the parameter is greater than the hypothesized value.
D.It is a​ one-tailed test since the alternative hypothesis states that the parameter is not equal to the hypothesized value.
E.It is a​ two-tailed test since the alternative hypothesis states that the parameter is greater than they hypothesized value.

Answer 1

C.It is a​ one-tailed test since the alternative hypothesis states that the parameter is greater than the hypothesized value.

Explanation:

Let p be the percentage of students enrolled in an introductory Chemistry class dropped before the midterm. Then null and alternative hypotheses are:

`H_(0)`: p=10%

`H_(a)`: p>10%

The alternative hypothesis states that the parameter is greater than the hypothesized value.