Middle Grades General Science 5 to 9
Question 28 of 30
Competency 9—Knowledge of process skills and application of scientific inquiry
DIRECTIONS: Read the question and select the best response.
A company that wanted to determine the effectiveness of its antiseptic gargle had 100 people examined by a doctor. Then, for one year, each person was checked once a month for an inflamed throat. At the end of the year, the total number of inflamed throats was tallied. For the next year, the same 100 people gargled each day with the company's antiseptic gargle. Each was checked monthly. The total number of inflamed throats at the end of the second year was 21% fewer than the number at the end of the first year. What is the major flaw in the design of this study?
- Enter to expand or collapse answer.Answer expanded
- Correct Response: B.