A B C D 12 20 10 10 32856 24 18 a.) State the researcher's null and alternative hypotheses (using symbols OR everyday language) b.) Is this a one or a two-tailed test? c.) Find the critical value (alpha = .05) I
A B C D 12 20 10 10 32856 24 18 a.) State the researcher's null and alternative hypotheses (using symbols OR everyday language) b.) Is this a one or a two-tailed test? c.) Find the critical value (alpha = .05) I
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Transcribed Image Text:**Research Scenario and Statistical Analysis**
A researcher is interested in seeing if listening to a political debate changes anxiety scores among people. The researcher knows from previous research that women generally score higher levels of anxiety.
The hypothesis predicted whether anxiety scores would be raised or lowered. Participants were given an anxiety test before and after listening to the political debate. Below are the data for four participants:
| Participant | Time 1 (X₁) | Time 2 (X₂) |
|-------------|------------|-------------|
| A | 20 | 24 |
| B | 22 | 26 |
| C | 10 | 12 |
| D | 18 | 20 |
**Questions:**
a) State the researcher's null and alternative hypotheses (using symbols OR everyday language).
b) Is this a one or a two-tailed test?
c) Find the critical value (alpha = .05).
d) Compute the observed test statistic (remember to show your work).
e) Based on the information above, what is your statistical conclusion?
Expert Solution

Step 1
It is given that the researcher gathers a sample of size n = 4 and gives these participants an anxiety test before and after listening to the political debate.
Note: According to Bartleby expert guidelines, we can answer only first question with their three subparts and rest can be reposted.
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