Scenarios. For the following scenarios Answer the following questions. Assume the data is from simple random samples and is normally distributed unless otherwise stated, or CLT cannot be applied.

A. What are the variable(s) in the study? Give their level of measurement. (Nominal, Ordinal, Continuous) (1 point)

B. If there are groups are they related in any way? (0.5 point)

C. Is it appropriate to use a parametric test? (0.5 point)

D. What statistical test is most appropriate to use in analyzing the data given the information provided. (1 point)

1. A developmental psychologist is investigating the impact of sugar consumption on children's activity level. She measures how many grams of sugar each child in a group of 400 consumes during an 8-hour period, then measures how many calories each child expends on a playground during a subsequent 30-minute play period. She wants to see if there is an association.

A.

B.

C.

D.

2. A researcher has 4 different concentrations of the same drug and wants to know if the concentration of the drug affects the subject's weight. He/she includes 50 subjects in each group and measures their weight (in kg) before they are given the drug and 6 months after being on the drug, and computes the change in weight for each subject. Assume the groups have equal variance.

A.

B.

C.

D.

3. A researcher wants to see if an intervention affects the ability of a subject to pass a test, recorded as pass/fail. You give 50 subjects the test and record their pass/fail status at baseline, and their pass/fail status after the intervention.

A.

B.

C.

D.

4. You want to know if your sample of 500 subjects comes from a population with an average weight of 150 pounds and unknown standard deviation.

A.

B.

C.

D