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    Correlation Coeffcient

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    Sabin Motorcycle Works plans to develop a brochure for its new revolutionary X2B cycle. One of the facets to be explored and reported on is the speed-mileage question: Is there a linear relationship between the cycle's speed and miles per gallon? Tests on their track revealed the following:
    Constant speed
    (miles per hour) Miles per gallon
    X Y
    40 54
    30 60
    70 37
    50 46
    60 48

    Compute the coefficient of correlation, and evaluate its strength.

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