Question

Cameron wondered if the average score on a final exam was different between those who texted on a regular basis during the lectures for a particular class and those that did not text at all during the lectures. Which of the following statements is correct?

a. A one-tailed test should be performed since the alternative hypothesis states that the parameter is less than the hypothesized value.
b. A one-tailed test should be performed since the alternative hypothesis states that the parameter is not equal to the hypothesized value.
c. A two-tailed test should be performed since the alternative hypothesis states that the parameter s no e ua to he ypo es e alue.
d. A two-tailed test should be performed since the alternative hypothesis states that the parameter is less than the hypothesized value.
e. A two-tailed test should be performed since the null hypothesis states that the parameter is not equal to the hypothesized value.

Answer 1

c. A two-tailed test should be performed since the alternative hypothesis states that the parameter is not equal to the hypothesized value.

Explanation:

Let p1 be the average score on a final exam who texted on a regular basis during the lectures for a particular class

And p2 be the average score on a final exam who did not texted at all during the lectures for a particular class

According to the Cameron's point of interest, null and alternative hypotheses are:

`H_(0):` p1 = p2

`H_(a):` p1 ≠ p2

Two tailed test should be performed since the alternative hypothesis states that the parameter is not equal to the hypothesized value.