The signal is equal to the average signal of the blank plus three times the standard deviation of the signal from the blank. It is the minimum amount of analyte that produces a signal which can be measured with reasonable accuracy. The concentration is equal to three times the standard deviation of the signal from the blank divided by the slope of the calibration curve. The concentration is equal to 10 times the standard deviation of the signal from the blank divided by the slope of the calibration curve. It is the minimum amount of analyte that produces a signal that is significantly different from the blank. Answer Bank