U7/L1 Match the description of the study design with the type of study being conducted.
1. SURVEYS are sets of questions given to people to seek their responses (a survey is a type of
observational study).
2. OBSERVATIONAL STUDY collect data without influencing things directly (but not a survey
type).
3. EXPERIMENTAL STUDIES collect data by directly influencing something to determine how
another thing changed.
A. Does a certain multivitamin help people lose weight? Researchers select 100 people to participate in the stude and assign them to 2 groups at
random. One group is given the multivitamin. The other group is given the fake pill.
The weights of all the participants are recorded daily for the next
3 months.
B. How do business customers feel about the level of support they receive? The business randomly selects 200 customers and asks them to share
their opinions.
C. Do truck drivers get into more accidents than people who drive SUVS? Researchers use police records of auto accidents over the past year and
vehicle registrations to compare the percentage of drivers of vehicles of each type that
get into accidents.
A:1 B:2 C:3
A:1 B:3 C:2
A:2 B:1 C:3
A:2 B:3 C:1
A:3 B:2 C:1
OA:3 B:1 C:2