A Consumer Advocacy Group Tested the "On-Air" Lifetimes of a Random

question 20

Multiple Choice

A consumer advocacy group tested the "on-air" lifetimes of a random sample of 162 cell phone batteries. The mean lifetime was 2.9 hours with a standard deviation of 0.4 hours. The lifetimes are approximately bell-shaped. Estimate the number of batteries with lifetimes between 2.1 hours and 3.7 hours.

• A)110
• B)8
• C)almost all (greater than 154)
• D)154

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Definitions:

Enforce

To compel obedience or compliance, often through legal or authoritative action.

Restrictive Indorsement

A limitation specified on the face of a check or document that restricts the further transfer of its title or requires certain conditions to be met.

Trust

A fiduciary relationship in which one party, known as a trustee, holds title to property for the benefit of another party, known as a beneficiary.

Pay to

Directs the transfer of money or assets to a specified person, entity, or account as outlined in a financial or legal document.