Examlex
In an investigation of the effects of caffeine on concentration,half the participants were given colas that contained caffeine and half were given decaffeinated colas.In this study,what is decaffeinated cola
Observational
A method of collecting data without manipulating the study environment or subjects, simply observing and recording information as it occurs naturally.
Experimental
Pertaining to the method or practice of testing hypotheses under controlled conditions to explore causality or effect.
Paired-Difference T-Test
A statistical technique employed to assess if there's a significant difference between the means of two connected groups by comparing them.
Significant Difference
A statistical assessment that indicates whether two or more groups differ from each other in a meaningful way, typically beyond what could occur by chance.
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