Paired T-Test on CAFFIENE data

This script first creates an internal dataset containing paired measurements (baseline vs caffeine). It then uses the TTEST procedure with the 'Side = U' option to perform an upper one-sided test on the paired data.

Data Analysis

Type : CREATION_INTERNE

The data is created via the DATALINES statement in the 'CAFFIENE' DATA STEP.

1 Code Block

DATA STEP Data

Explanation :
Creation of the temporary dataset CAFFIENE containing the baseline, caffeine, and pre-calculated difference variables.

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1	DATA CAFFIENE;
2	INPUT baseline caffiene diff;
3	DATALINES;
4	6.37 4.52 1.85
5	5.69 5.44 0.25
6	5.58 4.70 0.88
7	5.27 3.81 1.46
8	5.11 4.06 1.05
9	4.89 3.22 1.67
10	4.70 2.96 1.74
11	3.53 3.20 0.33
12	;

2 Code Block

PROC TTEST

Explanation :
Execution of a paired t-test (Side=U) comparing the 'baseline' variable to the 'caffeine' variable.

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1
2	PROC TTEST Side = U;
3	Paired baseline*caffiene;
4	RUN;
5

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