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

question 5

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

---

Definitions:

Parkinson's Disease

A neurodegenerative disorder characterized by motor symptoms like tremors, stiffness, and bradykinesia, often accompanied by cognitive decline.

Lewy Body Dementia

A type of progressive dementia that leads to a decline in thinking, reasoning, and independent function due to abnormal microscopic deposits that damage brain cells over time.

Memory Competence

The ability or capacity to effectively encode, store, and retrieve information when needed, reflecting the functionality of one's memory.

Language Comprehension

The ability to understand spoken or written language, grasping both literal and implied meanings.