A plot of concentration (C_i , ppm) vs. absorbance (A) gave the following equation for the calibration curve:

y = 0.503x + 0.003 ; where y = absorbance and x = concentration C_i.

A solution of a 10.0 ppm standard gave the following absorbance for 5 replicate measurements:

0.512 0.551 0.449 0.495 0.507

Answer the following:

What is the signal-to-noise ratio for this analysis at 10.0 ppm?

S/N ratio at 10.0 ppm is = ________ (report result to three decimal places with no units)