Miss Natalia

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About Miss Natalia

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Elementary,High School,College,University

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Accounting,Business & Finance See all
Accounting,Business & Finance,Calculus,Computer Science,Environmental science,Health & Medical Hide all
Teaching Since: Apr 2017
Last Sign in: 266 Weeks Ago
Questions Answered: 6064
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Education

  • Doctor of Education in Educational Leadership with a Specialization in Educational Technology
    Phoniex University
    Oct-1999 - Nov-2005

Experience

  • HR Executive
    a21, Inc.
    Nov-1998 - Dec-2005

Category > Math Posted 17 May 2017 My Price 5.00

what is the probability of observing a sample mean payment time of 65 invoices less than or equal to 18.1077 days?

  1. 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.

     

  2.  Using the 95% confidence interval, can we be 95% confident that µ ≤ 19.5 days?

     

  3. Using the 99% confidence interval, can we be 99% confident that µ ≤ 19.5 days?

     

  4. 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? 

     

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Miss Natalia
(14)
Status NEW Posted 17 May 2017 03:05 AM My Price 5.00

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