Instruction 8-3 A Quality Control Engineer Is Interested in the Mean Length

question 13

Short Answer

Instruction 8-3
A quality control engineer is interested in the mean length of timber poles being cut automatically by machine.The desired length of the insulation is 12 metres.It is known that the standard deviation in the cutting length is 0.15 metres.A sample of 70 cut poles yields a mean length of 12.14 metres.This sample will be used to obtain a 99% confidence interval for the mean length cut by machine.
-Referring to Instruction 8-3,the confidence interval goes from ________ to ________.

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Definitions:

Variables

Elements or quantities that can vary or change in a study or experiment.

Measure

Measure refers to a method or standard for obtaining a quantity represented or an amount of a characteristic, often through the use of instruments or statistical techniques.

Label

A descriptor or name assigned to something for the purpose of identification or to give additional information.

Student ID

A unique identifier assigned to students to differentiate them from others, typically used for administrative and identification purposes.