Back to Distinguish surveys, experiments, and observational studies — Problem 3 · Task Set 14
Exercises: Distinguish Surveys, Experiments, and Observational Studies
Work through each section in order. For classification problems, decide whether a study is a sample survey, an observational study, or a randomized experiment, and use two separate questions: "Was there random SELECTION?" (which governs whether results generalize to a population) and "Was there random ASSIGNMENT?" (which governs whether a difference can be read as causation). For explanation problems, write in complete sentences.
Grade 10·21 problems·~35 min·Common Core Math - HS Statistics and Probability·group·hss-ic-b-3
Work through problems with immediate feedback
A
Fluency Practice
Classify each study and identify the role of randomization.
1.
A researcher draws a sample at random from the population, then uses chance to place each chosen subject into a treatment group or a control group. Which two randomizations were used?