CitySearch

question 41

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 will conduct a proper 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.The significance level is .05.If the p-value turns out to be .075, what should you conclude?

• A)Don't reject the website's claim.
• B)Reject the website's claim.
• C)The sample provides strong evidence that the website's claim is true.
• D)Given the sample result, the website's claim can't be true.

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Definitions:

Pilot Device

A manual or automatic device that provides control input to a more complex system, often used to initiate, modulate, or stop functions.

Control Coil

An electromagnetic coil that is used to control the operation of a device, often found in relays, solenoids, and valves.

Differential Controls

Devices that function based on the difference in variables (such as temperature, pressure, or flow rate) to adjust or maintain system operation.

Mechanical Holding Circuit

A circuit design that maintains the current flow or signal, keeping a device like a relay activated even after the initial actuating signal is removed.