q46 A manufacturing plant produces steel rods.During one production run of 20,000 suchrods, the specifications called for rods thatwere 46 cm in length and 3.8 cm in width.Fifteen of these rods making up a randomsample were measured for length; the resultingmeasurements are shown here. Use these datato estimate the population variance of lengthfor the rods. Assume rod length is normallydistributed in the population. Construct a 99%confidence interval. Discuss the ramificationsof the results.44 cm 47 cm 43 cm 46 cm 46 cm45 cm 43 cm 44 cm 47 cm46 cm48 cm 48 cm 43 cm 44 cm45 cm(Round your answers to 2 decimal places,e.g. 1.75.)so?s

Here given 15 sample data of rod length

Answered: so?s | bartleby

Math

Statistics

so?s

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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Question

q46

A manufacturing plant produces steel rods.
During one production run of 20,000 such
rods, the specifications called for rods that
were 46 cm in length and 3.8 cm in width.
Fifteen of these rods making up a random
sample were measured for length; the resulting
measurements are shown here. Use these data
to estimate the population variance of length
for the rods. Assume rod length is normally
distributed in the population. Construct a 99%
confidence interval. Discuss the ramifications
of the results.
44 cm 47 cm 43 cm 46 cm 46 cm
45 cm 43 cm 44 cm 47 cm
46 cm
48 cm 48 cm 43 cm 44 cm
45 cm
(Round your answers to 2 decimal places,
e.g. 1.75.)
so?s

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