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 11 Feb 2018 My Price 5.00

Mexico City

Cars with catalytic converters. A quadratic model was applied to motor vehicle toxic emissions data collected over 15 recent years in Mexico City (Environmental Science and Engineering, September 1, 2000). The following equation was used to predict the percentage (y) of motor vehicles without catalytic converters in the Mexico City fleet for a given year

(a) Explain why the value 0 = 325,790 has no practical interpretation.

(b) Explain why the value 1 = −321.67 should not be interpreted as a slope.

(c) Examine the value of 2 to determine the nature of the curvature (upward or downward) in the sample data

(d) The researchers used the model to estimate ‘‘that just after the year 2021 the fleet of cars with catalytic converters will completely disappear.’’ Comment on the danger of using the model to predict y in the year 2021.

 

Answers

Maurice Tutor
(5)
Status NEW Posted 11 Feb 2018 03:02 PM My Price 5.00

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