The Lifetime of a Certain Type of Battery Is Normally

question 15

Essay

The lifetime of a certain type of battery is normally distributed with mean value 12 hours and standard deviation 1 hour. There are four batteries in a package. What lifetime value is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages?

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Definitions:

Unauthorized Use

The use of property or resources without permission, often leading to legal consequences or breaches of security.

Independent Internal Reviews

Evaluation processes conducted within an organization by an independent party to assess the organization's operations, procedures, or financial statements.

Accounting Period

A specific time frame covered by financial statements, typically a fiscal quarter or year, used for calculating earnings and managing taxation.

External Auditor

An independent third party hired to examine the financial statements of an entity to ensure accuracy and adherence to accounting standards.