A Scientist Randomly Divided a Group of 100 Lab Rats

question 46

Multiple Choice

A scientist randomly divided a group of 100 lab rats into two groups of 50. One group was fed regular rat chow while the other was fed the same amount of rat chow with added DDT. Both groups were housed in the same room with the same environmental conditions. At the end of the experiment, rats were weighed and the mean difference calculated.
-Refer to the accompanying narrative. Which variable(s) were manipulated by the scientist?

• A)DDT only
• B)temperature only
• C)weight differences only
• D)both DDT and weight differences
• E)both temperature and weight differences

---

Definitions:

Production Process

The sequence of operations or stages involved in the manufacture of a product, from raw materials to the final product.

Product Life Cycle

The stages a product goes through from introduction to growth, maturity, and decline in the market.

Quality Function Deployment

A systematic approach used to incorporate customer requirements into every phase of product development and production.

Planning Matrix

A tool or framework used to organize, prioritize, and systematically assess various aspects of a plan or project.