4. Engineers at the Maxwell Products Company have designed a new metal bearinrod that is alleged to be extremely durable. To estimate the mean useful lengthof life, engineers test nine of these rods and find that the useful length of life(in hours) of each is as follows:25,20025,40025,250Previous experience with similar such rods indicates that the useful length oflife of individual rods of this particular type is normally distributed. Constructa 90% confidence interval for the mean useful length of life of all rods of this25,00025,28025,30025,60025,01425,350new type.

For the given sample values, x¯=25266, from the excel function, =AVERAGE(O1:O9)s=186.0081, from the…

Engineers at the Maxwell Products Company have designed a new metal bearing rod that is alleged to be extremely durable. To estimate the mean useful length of life, engineers test nine of these rods and find that the useful length of lif. (in hours) of each is as follows: 25,000 25, 280 25,300 25,200 25,400 25,250 25,600 25,014 25,350 "revious experience with similar such rods indicates that tho

Engineers at the Maxwell Products Company have designed a new metal bearing rod that is alleged to be extremely durable. To estimate the mean useful length of life, engineers test nine of these rods and find that the useful length of lif. (in hours) of each is as follows: 25,000 25, 280 25,300 25,200 25,400 25,250 25,600 25,014 25,350 "revious experience with similar such rods indicates that tho

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

4. Engineers at the Maxwell Products Company have designed a new metal bearin
rod that is alleged to be extremely durable. To estimate the mean useful length
of life, engineers test nine of these rods and find that the useful length of life
(in hours) of each is as follows:
25,200
25,400
25,250
Previous experience with similar such rods indicates that the useful length of
life of individual rods of this particular type is normally distributed. Construct
a 90% confidence interval for the mean useful length of life of all rods of this
25,000
25,280
25,300
25,600
25,014
25,350
new type.

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