Question

A researcher tests whether cocaine use increases impulsive behavior, which is measured as the number of...

A researcher tests whether cocaine use increases impulsive behavior, which is measured as the number of impulsive events per hour. The researcher gives either 0 ng, 10 ng, 15 ng, or 20 ng to each group of mice.

  1. What is the dependent variable?
  2. What is the independent variable?
  3. Is the dependent variable continuous or discrete? Justify your response.
  4. Is the independent variable continuous or discrete? Justify your response.
  5. What is the level-of-measurement of the dependent variable? Justify your response
Math   Statistics-And-Probability   
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Answer #1

a. What is the dependent variable?

Number of impulsive events per hour

b. What is the independent variable?

cocaine :  0 ng, 10 ng, 15 ng, or 20 ng

c. Is the dependent variable continuous or discrete? Justify your response.

discrete since measured in exact numbers

d. Is the independent variable continuous or discrete? Justify your response.

discrete since measured in numbers

e. What is the level-of-measurement of the dependent variable? Justify your response

4 levels : 0, 10, 15, 20

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