A lab is conducting a test to see if people prefer cola A or cola B. The steps in the test are outlined below:
Step 1. Recruit one hundred volunteers and tell them the purpose of the study.
Step 2. Give them cola A and ask them to tell how delicious it is.
Step 3. Give them cola B and ask them to rate the flavor.
Step 4. Reveal which cola they preferred.
Which step could lead to biased results?
Step 1. Recruit one hundred volunteers and tell them the purpose of the study.
Step 2. Give them cola A and ask them to tell how delicious it is.
Step 3. Give them cola B and ask them to rate the flavor.
Step 4. Reveal which cola they preferred.
Which step could lead to biased results?
