I want to study jury decision making in Miami, and I want to have a representative sample for a mock jury study. I look at the demographic make-up of Miami-Dade county and obtain a pool of participants that matches it perfectly in all categories (gender, race, age, etc.). What sampling technique did I use

Proportionate Sampling.

Explanation:

Proportionate sampling refers to a sampling technique that is used where the sample consists of many subgroups that are very different in size. The number of participants in each subgroup is assessed by their number compared to the total population. In this sampling process, the investigator splits a finite sample of the population into subgroups and then applies random sampling techniques to each population group.

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.