QNT 561 Week 4 Case the Payment Time
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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?
[Solved] QNT 561 Week 4 Case the Payment Time
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- Submitted On 15 Jun, 2017 10:45:34
- Academia
- Rating : 60
- Grade : A+
- Questions : 0
- Solutions : 4595
- Blog : 1
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