Using a Convenience Sample Instead of a Random Sample of Subjects

question 40

Multiple Choice

Using a convenience sample instead of a random sample of subjects is a threat to which kind of validity?

• A) internal
• B) external
• C) construct
• D) statistical

---

Definitions:

Fish Population

Refers to the number of fish within a specific ecosystem or area, often considered in terms of species diversity and biomass.

Cetacean

Refers to a group of marine mammals that include whales, dolphins, and porpoises, characterized by their fully aquatic lifestyle and large brain size.

Porpoise

A small cetacean of the family Phocoenidae, similar in appearance to a dolphin but with a shorter, rounded snout.

Purple Loosestrife

An invasive plant species with tall spikes of purple flowers, often found in wetlands, affecting native habitats and biodiversity.