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Part $1$

A study to determine the correlation between bank deposits and consumer price indices in$$ Birmingham, Alabama, revealed the following$($which was based on nequals$5$ years of$$ data$)$:

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Summation from nothing to nothing xequals$15$

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Summation from nothing to nothing x squaredequals$55$

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Summation from nothing to nothing xyequals$70$

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Summation from nothing to nothing yequals$20$

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Summation from nothing to nothing y squaredequals$130$