Examlex
What limb lead shows the potential difference between the left leg and left arm?
Placebo
A substance with no therapeutic effect, used as a control in testing new drugs or used to induce psychological benefits purely through belief.
Matched Pair
A study design element where subjects are paired based on specific characteristics, ensuring that each pair is as similar as possible except for the variable under investigation.
Statistically Significant
A measure indicating that the likelihood of an observed outcome occurring by chance is low, often used in research to validate findings.
Negative Correlation
A connection between two variables where as one variable goes up, the other goes down, and the opposite is also true.
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