Question

identifying biased samples a dentist wants to find out how often her patients floss their teeth. which samples are biased? check all that apply. all her patients patients with no cavities patients younger than 18 every 20th patient every patient with braces

Explanation:

A biased sample is one that does not represent the entire population well. Patients with no cavities may be more likely to floss regularly. Younger patients may have different flossing habits than older ones. Patients with braces may have different oral - care routines. Sampling only these groups may not give a true picture of how often all patients floss. Sampling all patients or every 20th patient (systematic random sampling) is more likely to be representative.

Answer:

B. patients with no cavities
C. patients younger than 18
E. every patient with braces