A scientist is examining whether children’s math skills in 6th grade can predict

Question

A scientist is examining whether children’s math skills in 6th grade can predict later achievement. The scientist recruits 1,500 12-year old children to participate in the study. Each child's end of year score in math class (out of 100) is collected. The scientist follows-up 6 years later by accessing all of the children’s SAT scores. Using the information above in Scenario A, what is the IV (independent variable)? Using the information in Scenario A, what is the DV (dependent variable)? Using the information in Scenario A, the appropriate test to use would be: A scientist is examining the relationship between fitness and performance in a swimming race. To test this, she collects heart rate measures from 3 groups: low fitness, average fitness, and high fitness. All participants then are timed in a 100 meter freestyle race. What is the IV in Scenario B? What is the DV in Scenario B? For Scenerio B, the appropriate test to use would be: A scientist is studying the effect of massage therapy on arthritic patients. Patients go to massage therapy four times per week for 6 months. Each participant is given a questionnaire to report on the number of arthritic symptoms they are feeling. The questionnaire is given at baseline, at the end of the treatment cycle (6 mo.), and one year after the treatment. For Scenario C, the DV: ________ For Scenario C, the appropriate test to use would be _________

Explanation / Answer

Scenario A:

Independent variable : Age of children

Dependent Variable : Score

Appropriate Test would be : Paired t- test

Scenario B:

Independent variable : fitness

Dependent Variable : heart rate

Appropriate Test would be : Chi Square test

Scenario C:

Dependent Variable: The number of Arthiritis symptoms

Appropriate test would be : ANOVA

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