Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Management Posted 04 Dec 2017 My Price 7.00

Physical Sciences Hydraulic

Physical Sciences Hydraulic fracturing, or fracking, is a method used to extract natural gas from deep shale deposits. This process involves over 500 chemicals and millions of gallons of water. In a random sample of fracking wells, the mean depth was 8000 feet.44 Assume the standard deviation is 450 feet and the distribution of depths is approximately normal.

 

a. What proportion of wells have depths between 7100 and 8900 feet?

b. What proportion of wells have depths less than 6650 feet?

c. What proportion of wells have depths between 7550 and 9350 feet?

d. Suppose a new fracking well was drilled in 2012 to a depth of 8255. Is there any evidence to suggest that the mean depth of wells has changed?

Answers

Maurice Tutor
(5)
Status NEW Posted 04 Dec 2017 09:12 PM My Price 7.00

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