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***How were these answers derived?*** Total of 3 parts y^=0.70+1.283x where y^= Coal Sales and x= Weather Index. The coefficient of correlation of the data,

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***How were these answers derived?***

Total of 3 parts

y^=0.70+1.283x where y^= Coal Sales and x= Weather Index. The coefficient of correlation of the data, I (enter your response rounded to three decimal places). The standard error of the estimate, Sy,X=1.66 (enter your response rounded to two decimal places)

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