Question

a dentist conducts a survey to find out about the dental hygiene habits of her patients. which of the following is the most effective random sampling method for this survey study? a using patients id numbers to randomly select 50 patients and contacting them to fill out the survey b using patients last names to pick one patient with a last name that starts with each letter of the alphabet c asking 50 patients to fill out the survey and receive a 5% discount d asking the first 50 patients who visit the office to fill out the survey

Explanation:

Random sampling should be unbiased. Option A uses patient ID numbers to randomly select 50 patients, which is a random - based and unbiased method. Option B is not truly random as it selects patients based on last - name initials. Option C and D are convenience sampling methods as they target specific groups (first 50 patients or those who visit and receive a discount), which may introduce bias.

Answer:

A. Using patients' ID numbers to randomly select 50 patients and contacting them to fill out the survey