Hosea Is Studying the Relationship Between Caffeine Consumption and Problem-Solving

question 6

Multiple Choice

Hosea is studying the relationship between caffeine consumption and problem-solving ability.Which of the following is a categorical way to operationalize caffeine consumption?

• A) The number of glasses of soda consumed in a day
• B) The number of milligrams of caffeine consumed during the study
• C) The frequency of buying coffee drinks
• D) Whether the participant drank a soda in the 24 hours prior to the study
• E) All of the above are categorical ways of operationalizing caffeine consumption

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Definitions:

r Values

A measure of the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Hypotheses Testing

A statistical method used to determine whether there is enough evidence in a sample of data to infer that a certain condition is true for the entire population.

r Values

r Values, often denoted as the correlation coefficient, measure the strength and direction of a linear relationship between two variables.

Spearman Rank Correlation

A non-parametric measure of correlation that assesses the strength and direction of the association between two ranked variables, useful for ordinal data.