I need help with week 4 assignment

The Payment Time CasePurpose of Assignment The purpose of the assignment is to develop students’ abilities in using datasets to apply the concepts of sampling distributions and confidence intervals to make management decisions. Assignment Steps Resources: Microsoft Excel®, The Payment Time Case Study, The Payment Time Case Data Set Review the Payment Time Case Study and Data Set. Develop a 700-word report including the following calculations and using the information to determine whether the new billing system has reduced the mean bill payment time:Assuming the standard deviation of the payment times for all payments is 4.2 days, construct a 95% confidence interval estimate to determine whether the new billing system was effective. State the interpretation of 95% confidence interval and state whether or not the billing system was effective.Using the 95% confidence interval, can we be 95% confident that µ = 19.5 days?Using the 99% confidence interval, can we be 99% confident that µ = 19.5 days?If the population mean payment time is 19.5 days, what is the probability of observing a sample mean payment time of 65 invoices less than or equal to 18.1077 days? Format your assignment consistent with APA format. Click the Assignment Files tab to submit your assignment.MaterialsThe Payment Time Case Grading GuideThe Payment Time Case StudyThe Payment Time Case Data Set


Don't use plagiarized sources. Get Your Custom Essay on
I need help with week 4 assignment
Just from $13/Page
Order Essay

Unformatted Attachment Preview

Case Study ? Payment Time Case Study
QNT/561 Version 9
University of Phoenix Material
Case Study ? Payment Time Case Study
Major consulting firms such as Accenture, Ernst & Young Consulting, and Deloitte & Touche Consulting
employ statistical analysis to assess the effectiveness of the systems they design for their customers. In
this case, a consulting firm has developed an electronic billing system for a Stockton, CA, trucking
company. The system sends invoices electronically to each customer?s computer and allows customers to
easily check and correct errors. It is hoped the new billing system will substantially reduce the amount of
time it takes customers to make payments. Typical payment times?measured from the date on an
invoice to the date payment is received?using the trucking company?s old billing system had been 39
days or more. This exceeded the industry standard payment time of 30 days.
The new billing system does not automatically compute the payment time for each invoice because there
is no continuing need for this information. The management consulting firm believes the new system will
reduce the mean bill payment time by more than 50 percent. The mean payment time using the old billing
system was approximately equal to, but no less than, 39 days. Therefore, if µ denotes the new mean
payment time, the consulting firm believes that µ will be less than 19.5 days. Therefore, to assess the
system?s effectiveness (whether µ < 19.5 days), the consulting firm selects a random sample of 65 invoices from the 7,823 invoices processed during the first three months of the new system?s operation. Whereas this is the ?rst time the consulting company has installed an electronic billing system in a trucking company, the ?rm has installed electronic billing systems in other types of companies. Analysis of results from these other companies show, although the population mean payment time varies from company to company, the population standard deviation of payment times is the same for different companies and equals 4.2 days. The payment times for the 65 sample invoices are manually determined and are given in the Excel® spreadsheet named ?The Payment Time Case?. If this sample can be used to establish that new billing system substantially reduces payment times, the consulting firm plans to market the system to other trucking firms. Copyright © 2017 by University of Phoenix. All rights reserved. 1 PayTime 22 19 16 18 13 16 29 17 15 23 18 21 16 10 16 22 17 25 15 21 20 16 15 19 18 15 22 16 24 20 17 14 14 19 15 27 12 17 25 13 17 16 13 18 19 18 14 17 17 12 23 24 18 16 16 20 15 24 17 21 15 14 19 26 21 ... Purchase answer to see full attachment

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages

Order your essay today and save 15% with the discount code ESSAYHELP