A. I only
B. II only
C. III only
D. I and III only
E. I and II only
A. Categorical variables
B. Cause-and-effect variables
C. Confounding variables
D. Unfounded variables
E. Quantitative variables
A. 2 factors, 7 levels and 420 treatments
B. 2 factors, 3 levels and 12 treatments
C. 3 factors, 7 levels and 420 treatments
D. 3 factors, 12 levels and 420 treatments
E. 3 factors, 7 levels and 12 treatments
A. Write the name of each student in the senior class on a slip of paper and put the papers in a container. Then randomly select 40 slips of paper from the container.
B. Assuming the classes are unlaned, select two classes at random and include those in your sample.
C. From a list of all seniors, select every nth name on the list until you have 40 people selected.
D. Select the first 40 seniors to pass through the cafeteria door at lunch.
E. Randomly select 10 students from each of the four senior calculus classes.
A. Completely randomized
B. Comparative randomized, blocked by gender
C. Completely randomized, stratified by gender
D. Randomized, blocked by gender and type of medication
E. A matched pairs design
A. A stratified random sample
B. A simple random sample
C. A convenience sample
D. A systematic random sample
E. An observational study
A. A convenience sample
B. A voluntary response sample
C. A probability sample
D. A stratified random sample
A: Double dummy design
B: Single-blind design
C: Double-blind design
D: Finite population design
E: Stratified sample design