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Paired t test for stress before and after taking a drug

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A researcher wants to know if there is a difference in people's stress before and after taking a drug. The lower the number, the less their stress level. 30 participants were involved.

a) What statistical test should be used? Why?
b) Show all steps to analyze data.
c) Summarize findings using APA format and including necessary tables and/or figures.

Before:
25
23
27
27
21
30
22
20
25
29
26
21
20
22
18
27
20
21
21
18
23
19
21
18
22
23
22
18
17
19

After:
18
20
19
22
17
18
15
19
17
20
24
23
19
17
14
21
22
23
18
17
15
15
22
15
18
16
21
17
14
16.

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Step-by-step method for computing test statistic Paired t test for stress before and after taking a drug.

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Dependent group t test)
A researcher wants to know if their is a difference in people's stress before and after taking a drug. The lower the number, the less their stress level. 30 participants were involved.

a) What statistical test should be used? Why?
b) Show all steps to analyze data.
c) Summarize findings using APA format and including necessary tables and/or figures. ...

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