Twenty College Students Experience the Effects of Alcohol on Reaction

question 44

Multiple Choice

Twenty college students experience the effects of alcohol on reaction time.They perform very basic timed responses in a driving simulator both before and after consuming several alcoholic beverages.The researcher collects a reaction-time result for each of the 20 students before and after intoxication, for a total of 40 measures.What is the null hypothesis for this paired-samples study?

• A) There is no difference in reaction time before and after consuming alcohol.
• B) Reaction time slows with alcohol consumption.
• C) There is a difference in reaction time before and after consuming alcohol.
• D) Reaction time quickens with alcohol consumption.

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Definitions:

Standard Deviation

A statistical measure that quantifies the amount of variation or dispersion of a set of data values from the mean.

Negatively Skewed

A negatively skewed distribution is one where the tail on the left side of the probability density function is longer or fatter than the right side, indicating that the bulk of the values are skewed to the right.

Variability

The degree to which scores in a set of data spread out or differ from each other.

Range

The range is calculated by subtracting the smallest value from the largest value in a set of data.