Question: To calibrate a method for measuring lead concentration in water, the method was applied to 12 water samples with known lead content. The concentration measurements,

To calibrate a method for measuring lead concentration in water, the method was applied to 12 water samples with known lead content. The concentration measurements, y, and the known concentration levels, x, are given below

Compute the sample covariance and correlation coefficient.

x 5.95 2.06 1.02 4.05 3.07 y 6.33 2.83 1.65 4.37 3.64 8.99 8.45 2.93 3.16 9.33 7.24 6.91 9.92 2.86 9.54 7.11 7.10 8.84 3.56

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