Problem uses the data on time to wear out of shave dies

Assignment Help Accounting Basics

Reference no: EM131056570

This problem uses the data on time to wear out of shave dies in Problem 4.1 of Chapter 4.

(a) Plot the product-limit estimate of the cumulative distribution function on Weibull paper and assess the validity of the data and the fit of the Weibull distribution. Use the following STATPAC output. CENTER denotes the Weibull (Y and SPREAD denotes ß

(b) Does the ML estimate of the shape parametel 3uggest that the failure rate of the dies increases or decreases with die age?

(c) Do the confidence limits for the shape parameter provide convincing evidence that the failure rate increases or decreases with die age?

(d) On the Weibull plot from (a), plot the fitted distribution and confidence limits for the percentiles

Problem 4.1

Shave die. The following are life data (in hours) on a shave die used in a manufacturing process. Operating hours for shave dies that wore out: 13.2 67.8 76 59 30 26.7 26 68 30.1 76.3 43.5. Operating hours on shave dies that were replaced when the production process was stopped for other reasons: 45.1 27 49.5 62.8 75.3 13 58 34 48 49 31.5 18.1 34 41.5 62 66.5 52 60.1 31.3 39 28.6 7.3 40.3 22.1 66.3 55.1

(a) Calculate hazard (or probability) plotting positions for dies that wore out.

(b) Plot the data on Weibull hazard (or probability) paper.

(d) Graphically estimate the Weibull shape parameter. Does it suggest that the instantaneous failure rate increases or decreases with die life? An increasing one indicates that dies over a certain age should be replaced when the production process is stopped for other reasons, as die wear out stops production and is therefore costly.

Reference no: EM131056570

Questions Cloud

System downloads it from windows update : If you try to enable that feature again, the system downloads it from Windows Update or, alternatively, retrieves it from an image file you specify using the -Source flag with the Install-Windows Feature cmdlet.

Weibull distribution to the locomotive control data : Locomotive control (Weibull). The following STATPAC output shows the ML fit of a Weibull distribution to the locomotive control data of Section 2. CENTER: a and SPREAD = ß

Program that uses nftw() to traverse a directory tree : Write a program that uses nftw() to traverse a directory tree and finishes by printing out counts and percentages of the various types (regular, directory, symbolic link, and so on) of files in the tree.

Nic teaming on a server with two network adapters : You are configuring NIC teaming on a server with two network adapters. You chose Switch Independent Mode. You now must choose between the two modes determining if one adapter is left offline or both adapters are functional.

Problem uses the data on time to wear out of shave dies : (a) Plot the product-limit estimate of the cumulative distribution function on Weibull paper and assess the validity of the data and the fit of the Weibull distribution. Use the following STATPAC output. CENTER denotes the Weibull (Y and SPREAD d..

Implement a function that performs the equivalent of getcwd : The caller should be left in the same directory in which it started, regardless of whether your getcwd() function succeeds or fails (open() plus fchdir() are handy for this purpose).

Theoretical perspectives and practical applications : PHE3SPH Assignment - identifying and briefly outlining the theory/model that you have chosen for the contextualisation/discussion of this type of acquired brain injury.

Organizational risk appetite and risk assessment : Imagine that a software development company has just appointed you to lead a risk assessment project. The Chief Information Officer (CIO) of the organization has seen reports of malicious activity on the rise and has become extremely concerned wit..

Development of creative and relevant marketing programs : The strategic brand-marketing project allows the development of practical skills in brand audit, analysis of brand equity and development of creative and relevant marketing programs and brand strategies. You must provide recommendations on how th..

User Account

All Pages