[1,951; 2,009]

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter26: Customary (english) Units Of Measure
Section: Chapter Questions
Problem 6A: Add 432.78 + 43.278 + 4.3278.
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Question

In a sawmill, a machine is set to cut
wood boards. To estimate the average length of
these boards, a sample of 120 boards is taken and
a mean length of 1.98 m is found with a sampling standard
deviation s = 0.16 m. Construct a confidence interval at the 95% confidence level to estimate the
average length of the boards cut by this machine.

[1,951; 2,009]
Transcribed Image Text:[1,951; 2,009]
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