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for a set of data the line of best fit is given by y=-.687x + 3.431 and r^2=.325. what is the correlation efficient

  • trig - ,

    The correlation coefficient (r) is just the square root of r² ... but there are two square roots of r², namely +r and -r. However, there's a clue: the line of best fit has a negative slope - so that tells you the sign of r.

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