Now Lynn takes a different approach. They collect another two samples - GPA from students taking a semester of in-class courses, and then the same students' GPA when they are taking a semester of online courses. The data set is below. They predict that they will find a difference between in-class GPA and online GPA for the same students. Student In Class GPA Online GPA Amy 4.0 3.5 Brad 3.5 2.2 Caroline 3.7 2.0 Dan 3.5 3.5 Emily 3.6 3.3 Frank 3.2 3.2 George 3.3 2.1 For this test, we should use ______ critical values and p-values. Group of answer choices a) One tail b) Two tail c) Three tail d) None of the answers
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Now Lynn takes a different approach. They collect another two samples - GPA from students taking a semester of in-class courses, and then the same students' GPA when they are taking a semester of online courses. The data set is below. They predict that they will find a difference between in-class GPA and online GPA for the same students.
| Student | In Class GPA | Online GPA |
|
Amy |
4.0 |
3.5 |
| Brad | 3.5 | 2.2 |
| Caroline | 3.7 | 2.0 |
| Dan | 3.5 | 3.5 |
| Emily | 3.6 | 3.3 |
| Frank | 3.2 | 3.2 |
| George | 3.3 | 2.1 |
For this test, we should use ______ critical values and p-values.
One tail test: An alternative hypothesis with a direction leads to a one-tailed test. i.e., when the null hypothesis's stated value for the parameter is actually either higher or smaller than what the alternative hypothesis predicts.
Two tail test: An alternative hypothesis without a direction generates a two-tailed test. specifically when the alternative hypothesis claims that the null hypothesis is incorrect.
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