Question

barry surveyed 2 patients who spent more than two hours at the dentists office.
is this sample of the dentists patients in general likely to be biased?
yes
no

Explanation:

The sample only includes patients who spent over 2 hours at the dentist, which excludes the majority of patients who likely spend less time. This narrow, non-representative selection creates bias as it does not reflect the full population of the dentist's patients. Additionally, the sample size of 2 is extremely small, further reducing its representativeness.

Answer:

yes