A Company Provides Portable Walkie-Talkies to Construction Crews

question 27

Essay

A company provides portable walkie-talkies to construction crews. Their batteries last, on average, 55 hours of continuous use. The purchasing manager receives a brochure advertising a new brand of batteries with a lower price, but suspects that the lifetime of the batteries may be shorter than the brand currently in use. To test this, the new brand is installed in 8 randomly selected radios. Here are the results for the lifetime of the batteries (in hours): 45 52 56 55 51 57 48 52 Is there sufficient evidence to conclude that the purchasing manager is correct in his conjecture that the new brand has a shorter average lifetime?

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Definitions:

Unity of Direction Principle

A leadership principle suggesting that team members should work towards the same objectives in a coordinated and cohesive manner.

Bureaucracy

An organizational system characterized by structured procedures and formal rules, typically involving a hierarchy of authority.

Modern Science

A systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.

Hawthorne Studies

A series of productivity experiments conducted from 1924 to 1932, which concluded that workers' performance is influenced more by social factors and their working conditions than by physical or environmental factors.