After Defining the Variables Involved in a Study,scientists Have to Identify

question 7

Essay

After defining the variables involved in a study,scientists have to identify individuals to study.The population is the group of individuals to whom we hope our conclusions will apply.Researchers generally hope that their conclusions will apply to a large population,such as all 20-year-olds in the country.Because it is not practical to examine everyone in the population,researchers study a sample of people and assume that the results for the sample apply to the whole population.Briefly define the following types of samples: convenience sample,representative sample,random sample,and cross-cultural sample.​

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Definitions:

Ozone Hole

A significant depletion of the ozone layer in the Earth's stratosphere, primarily over Antarctica, resulting from the emission of chlorofluorocarbons (CFCs).

Ozone-Depleting Chemicals

Substances, such as chlorofluorocarbons (CFCs), that reduce the ozone layer in the Earth's stratosphere, contributing to ozone depletion.

Fossil Fuels

Natural fuels such as coal, oil, and natural gas, which are formed from the remains of living organisms over millions of years and used for energy production.

Skin Cancer

A type of cancer that forms in the cells of the skin, often due to exposure to UV radiation from the sun or tanning beds.