Purpose of Assignment<\/p>\n
The purpose of the assignment is to develop students\u2019 abilities in using data sets to apply the concepts of sampling distributions and confidence intervals to make management decisions.<\/p>\n
Assignment Steps<\/p>\n
Resources: Microsoft Excel\u00ae, The Payment Time Case Study<\/p>\n
Review the Payment Time Case Study<\/p>\n
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:<\/p>\n
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.
\nUsing the 95% confidence interval, can we be 95% confident that \u00b5 \u2264 19.5 days?
\nUsing the 99% confidence interval, can we be 99% confident that \u00b5 \u2264 19.5 days?
\nIf 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?
\nSubmit your assignment.<\/p>\n
Resources
\nThe Payment Time Case Grading Guide
\nCenter for Writing Excellence
\nReference and Citation Generator
\nGrammar and Writing Guides<\/p>\n","protected":false},"excerpt":{"rendered":"
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