Question 1 • Academy - Algebra, Functions, and Data Analysis
A researcher wants to know if eating a mint affects whether people can distinguish between two popular orange juice brands. To conduct an experiment, the researcher places 50 participants in two groups. The treatment group will eat a mint before drinking a juice, while the control group will not eat a mint before drinking. Then the participants will guess the juice brand. To select the groups, the researcher labels each participant with a number and selects slips of paper labeled 1–50 from a bowl at random. The first 25 participants whose numbers are selected will be the treatment group, while the other 25 will be the control group.
Answer
A
should be roughly equivalent because both groups will have 25 participants.
B
should be roughly equivalent because the participants were labeled and then randomly selected for the groups.
C
might not be roughly equivalent because one group may contain people that drink more juice than the other group.
D
might not be roughly equivalent because one group may contain more people that prefer a particular juice brand.