Lucy Baker Is Analyzing Demographic Characteristics of Two Television Programs $\sigma$

question 69

Multiple Choice

Lucy Baker is analyzing demographic characteristics of two television programs, American Idol (population 1) and 60 Minutes (population 2) . Previous studies indicate no difference in the ages of the two audiences. (The mean age of each audience is the same.) Her staff randomly selected 100 people from each audience, and reported the following: ₁ = 43 years and
₂ = 45 years. Assume that $\sigma$ ₁ = 5 and $\sigma$ ₂ = 8. Assuming a two-tail test and $\alpha$ =.05, the observed z value is ___.

• A) -2.12
• B) -2.25
• C) -5.58
• D) -15.38
• E) -20.68

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Definitions:

Progression Principle

A principle in exercise and training that emphasizes the need for an incremental increase in the intensity and overload to achieve continued improvement.

Human Needs

Fundamental requirements necessary for individual well-being, including physiological, safety, love/belonging, esteem, and self-actualization needs as described by Abraham Maslow.

Self-Fulfilling Prophecy

A prediction that directly or indirectly causes itself to become true, due to positive feedback between belief and behavior.