CitySearch

question 108

Multiple Choice

CitySearch.com reports that 55% of its users are in the 18-to-30 age demographic, 35% are in the 31-to-45 demographic, and the remaining 10% are in the 46-and-older demographic.In a recent survey of 200 randomly selected CitySearch.com users, 102 users were in the 18-to-30 age demographic, 84 were in the 31-to-45 demographic, and the rest were in the 46-and-older demographic You conduct a chi-square test to determine whether this sample result is enough to reject a null hypothesis that the age group distribution of CitySearch.com users is as the website describes.Report the value of the chi-square test statistic..

• A)7.94
• B)2.35
• C)5.18
• D)9.83

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Definitions:

Chemicals

Substances with distinct molecular compositions that are used in or produced by chemical processes.

Echoes

Reflected sound waves that return to the listener, allowing organisms or devices to locate objects and navigate environments through echolocation.

Hypothesis

A proposed explanation for a phenomenon, made as a starting point for further investigation, which can be tested through experimentation or observation.

Male Song Sparrows

A species of birds known for their complex vocalizations used in territory defense and mating, focusing on the male's role in these behaviors.