A Company Claims That the Standard Deviation in Their Delivery

question 67

Essay

A company claims that the standard deviation in their delivery time is less than 5 days. A sample of 27 past customers is taken. The average delivery time in the sample was 14 days with a standard deviation of 4.5 days. At a 5% level of significance, test the company's claim.

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Definitions:

Middle Ear

The air-filled central section of the ear, located behind the eardrum, which contains the ossicles that transmit sound vibrations to the inner ear.

Labyrinth/o

A prefix in medical terminology referring to the labyrinth of the inner ear, involved in hearing and balance.

Cochlea

A spiral-shaped cavity in the inner ear containing the organ of Corti, which produces nerve impulses in response to sound vibrations.

Endo-

A prefix meaning within or inside, often used in medical and scientific terms.