QNT 561 Wk 4 – The Payment Time Case
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QNT 561 Wk 4 – The Payment Time Case
Purpose of Assignment
The purpose of the assignment is to develop students’ abilities in using data sets to apply the concepts of sampling distributions and confidence intervals to make management decisions.
Assignment Steps
Resources: Microsoft Excel®, The Payment Time Case Study
Review the Payment Time Case Study
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?
Submit your assignment.
Resources
The Payment Time Case Grading Guide
Center for Writing Excellence
Reference and Citation Generator
Grammar and Writing Guides