Question

find the technique for gathering data in the study below. the colorado division of wildlife netted and released 774 fish at quincy reservoir. there were 219 perch, 315 blue gill, 83 pike, and 157 rainbow trout. ○ census ○ experiment ○ none of these choices ○ sampling ○ observational study

Explanation:

1. Census: A census aims to collect data from every individual in a population. Here, the Colorado Division of Wildlife netted and released 774 fish, but this is not the entire population of fish in the reservoir (implied, as reservoirs have more fish than just 774), so it's not a census.
2. Experiment: An experiment involves manipulating variables or applying treatments. This study just involves capturing and counting fish, with no manipulation, so not an experiment.
3. Sampling: Sampling involves selecting a subset (sample) from a larger population to gather data. The 774 fish netted are a sample of the total fish population in Quincy Reservoir, as they are a portion of all fish there.
4. Observational Study: While observational studies involve observing without manipulation, sampling is a more specific technique here. The key is that they selected a sample (netted 774 fish) from the larger population of fish in the reservoir to count species, which fits sampling.

Answer:

D. sampling