The student wants to present the study's finding while acknowledging its limitations. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Question

While researching a topic, a student has taken the following notes:
- A study of 500 shoppers compared those who used a written shopping list with those who did not.
- List users spent 12% less per trip.
- Shoppers chose for themselves whether to use a list.
- List users tended to be older than non-users.

Accepted Answer

A. List users spent 12% less per trip, though since shoppers chose for themselves whether to use a list, and list users tended to be older, the difference may not be due to the list itself.. Finding plus both caveats — self-selection and age — from the notes.

Answer

B. The study compared 500 shoppers with and without lists. — Setup only.

Answer

C. Using a written shopping list cuts spending by 12%. — The finding stated as a cause, with no limitation.

Answer

D. Older shoppers spend 12% less than younger shoppers. — The notes don't compare spending by age; they flag age as a possible confound.

Expression of Ideas practice question

Answer: A. List users spent 12% less per trip, though since shoppers chose for themselves whether to use a list, and list users tended to be older, the difference may not be due to the list itself.

Why the other answers are wrong

More Expression of Ideas questions