A Study Compares the Effect on College Students of Two

question 46

Multiple Choice

A study compares the effect on college students of two different TV advertisements for spring break in Gulf Shores, Alabama. Call the ads "Ad #1" and "Ad #2." We want to know which ad makes more students want to visit Gulf Shores during spring break. The subjects are 90 students taking a course in hotel management. The design of the study looks like this: A weakness of this study is that

• A) this is an observational study, so we can't conclude that the ad viewed causes the response.
• B) the design is biased in favor of Ad #1.
• C) the design is biased against Ad #1.
• D) because the students all come from one course, the findings may not extend to all college students.
• E) there is no placebo group.

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Definitions:

Embryonic Differentiation

Embryonic differentiation is the process during embryonic development in which unspecialized stem cells give rise to specialized cells, forming various tissues and organs.

Apical Meristems

Regions at the tips of roots and shoots in plants where cells actively divide, allowing for elongation and growth.

Dermal Tissues

Plant tissues that make up the outer layer of a plant, providing protection and aiding in gas exchange.

Vascular Tissues

The complex tissues in plants responsible for conducting water, nutrients, and food throughout the organism, consisting mainly of xylem and phloem.