Final answer:
Paige DeMarco is using a convenience sample, which is a type of non-probability sampling where the researcher selects individuals who are easily accessible or readily available.
Step-by-step explanation:
In this scenario, Paige DeMarco is using a convenience sample.
A convenience sample is a type of non-probability sampling where the researcher selects individuals who are easily accessible or readily available.
In this case, Paige DeMarco is selecting the first 100 alumni listed on a web-based social networking site for State University to contact regarding possible donations. She is choosing this sample because they are easy to contact through the social networking site, making it a convenience sample.