Checkpoint: Studies and Variables Solution
Name the population and type of study. Then classify the variable(s).
While her English class highlighted the vocabulary in a reading passage, Ms. Booker watched the class and noted the color highlighters they used, and whether each student worked forward or backward through the passage.
Population: students in the English class
Study: observational study
Variables: color of highlighters (C), work forward or backward (C)
Note
Q: Is there a sample in this study? Explain.
A: No, because Ms. Booker observed what each student was doing.
Q: How could the observational study be changed into a survey?
A: Instead of watching the students, Ms. Booker could ask them what color highlighter they used and how they completed their work.