How Many Total Subjects Are Needed in a 2 X

question 2

Multiple Choice

How many total subjects are needed in a 2 x 2 repeated-measures design with 10 subjects in each treatment condition?

• A) 10
• B) 20
• C) 40
• D) 80

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Definitions:

PICO Question

A framework used in evidence-based practice to formulate a clinical question, consisting of Population, Intervention, Comparison, and Outcome.

Topical Antibiotic

A medication used externally to kill or inhibit the growth of bacteria on the skin or mucous membranes to treat or prevent infection.

Chlorhexidine Solution

An antiseptic solution used for cleaning the skin or mouth, effective in reducing bacteria and preventing infection.

Catheter-Associated Urinary

Infections involving the urinary tract that are associated with the use of a urinary catheter.