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i. If the null hypothesis β4 = 0 is not rejected, then the independent variable X4 has a strong effect in predicting the dependent variable ii. A dummy variable is added to the regression equation to control for error.
Iii) A variable whose possible outcomes are coded as a "1" or a "0" is called a strong independent variable.
Alcohol
A psychoactive substance found in drinks such as beer, wine, and spirits that can affect the mind and body.
Amphetamines
Stimulant drugs that speed up the nervous system, often used to treat conditions like ADHD.
Tolerance
The capacity to endure continued subjection to something, such as a drug or environmental conditions, without adverse reaction.
Drug
A substance which has a physiological effect when ingested or otherwise introduced into the body, often used for medicinal, recreational, or performance-enhancing purposes.
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