TABLE 8-2 A Quality Control Engineer Is Interested in the Mean Length

question 113

True/False

TABLE 8-2
A quality control engineer is interested in the mean length of sheet insulation being cut automatically by machine. The desired mean length of the insulation is 12 feet. It is known that the standard deviation in the cutting length is 0.15 feet. A sample of 70 cut sheets yields a mean length of 12.14 feet. This sample will be used to obtain a 99% confidence interval for the mean length cut by machine.
-Referring to Table 8-2, the confidence interval is valid only if the lengths cut are normally distributed.

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Definitions:

Tinea

A fungal infection of the skin, also known as ringworm, which manifests as scaly, itchy patches.

Fungal Condition

A health issue caused by fungal infections, affecting various parts of the body and ranging in severity.

Onychia

An inflammation of the nail bed resulting in pain, swelling, and sometimes loss of the nail.

Nail Bed

The skin beneath the nail plate that provides nourishment and support for nail growth.