LongLast Inc

question 48

Essay

LongLast Inc. produces car batteries. The mean life of these batteries is 60 months. The distribution of the battery life closely follows the normal probability distribution with a standard deviation of eight months. As a part of its testing program, LongLast tests a sample of 25 batteries. What proportion of the samples will have a mean useful life less than 56 months?

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Definitions:

Social Media

Websites and platforms that allow users to generate and distribute their own content as well as engage in social networking activities.

Traditional Media

Forms of mass communication that existed before the advent of digital media, such as newspapers, television, and radio.

Social Media

Digital channels that facilitate creating and sharing of information, ideas, interests, and other forms of expression via communities and networks.

External Communication

The exchange of information and messages between an organization and external entities such as customers, partners, or the public.