Before Polling Students in the School of Business, the Researcher

question 46

Multiple Choice

Before polling students in the School of Business, the researcher divides all the current students into groups based on their class standing (freshman, sophomores, etc) . Then, she randomly draws a sample of 50 students from each of these groups to create a representative sample of the entire student body in the School. The researcher is practicing which of the following sampling methods?

• A)Simple random sampling
• B)Systematic random sampling
• C)Stratified random sampling
• D)Cluster sampling
• E)Snowball sampling

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Definitions:

Pollution Prevention

The practice of reducing or eliminating waste at the source by modifying production processes, promoting the use of non-toxic or less-toxic substances, implementing conservation techniques, and re-using materials rather than putting them into the waste stream.

Synthetic Steps

Sequential chemical reactions conducted to synthesize complex molecules from simpler substances, often outlined in a synthetic pathway or scheme.

Chemical Waste

Unwanted or residual substances produced during chemical manufacturing, research, or use, often hazardous to the environment or health.

Unwanted By-products

Secondary or incidental products generated during a chemical process or reaction that are not the primary target products.