A Medical Engineering Company Creates X-Ray Machines

question 33

Short Answer

A medical engineering company creates x-ray machines. The machines the company sold in 1995 were expected to last six years before breaking. To test how long the machines actually lasted, the company took a simple random sample of six machines. The company got the following results (in years) for how long the x-ray machines lasted: 8, 6, 7, 9, 5, and 7. Assume the distribution of the longevity of x-ray machines is normally distributed. Construct a 98% confidence interval for the average longevity of x-ray machines.

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Definitions:

Remote Control

A device or system used to operate machinery, appliances, or systems from a distance without physical connections.

Manual Motor Starters

Devices used to manually turn on or off electric motors, providing safety by isolating electrical power.

Power Circuit

The part of an electrical system that distributes power to various components or devices, capable of handling high currents.

Contactor Unit

An electrical device designed to switch an electrical power circuit on or off, typically used for controlling large loads in industrial applications.