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Nitrates (X): 10, 7, 15, 30, 20, 60, 60, 100, 140, 320 Absorbance (Y): 5, 7, 10, 25, 40, 90, 130, 190, 320, 225 Chemical

Nitrates (X): 10, 7, 15, 30, 20, 60, 60, 100, 140, 320

Absorbance (Y): 5, 7, 10, 25, 40, 90, 130, 190, 320, 225

Chemical theory says that these data should lie on a straight line. If the correlation is not at least 0.997, something went wrong and the calibration procedure is repeated.

A) Find the correlation r:

r = ?

B) Must the calibration be done again? Yes or No?

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