Description
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(HW9 question 3 continued) In biofiltration of wastewater, air discharged from a treatment facility is passed through a damp porous membrane that causes contaminants to dissolve in water and be transformed into harmless products. The accompanying data on x= inlet temperature (°C) and y= removal efficiency (%) was the basis for a scatter plot that appeared in the article “Treatment of Mixed Hydrogen Sulfide and Organic Vapors in a Rock Medium Biofilter”(Water
Environment Research, 2001: 426–435). The scatter plot and the summary statistics are given below.
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Calculate the fitted regression equation.
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Interpret the intercept in A.
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Interpret the slope in B.
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Obtain a prediction of removal efficiency when temperature=12.
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Chapter 12, Section 12.5, Exercise 58 parts a b c
Use these summary statistics:
n=12
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(xi)=44,615
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(xi)2=170,355,425
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(yi)=3,860
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(yi)2=1,284,450
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(xiyi)=14,755,500
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Do not forget to interpret the correlation in part (a). Qualify the strength of the linear relationship between x and y.
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For parts (b) and (c), just say if will increase, decrease, or remain the same. No need to explain.
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