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A methane analysis was performed by Light Yagami. His least squares analysis returned the following data: Equation of calibration curve: Signal in mV=870[ppm concentration of

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A methane analysis was performed by Light Yagami. His least squares analysis returned the following data: Equation of calibration curve: Signal in mV=870[ppm concentration of methane] 22 sy=18.1N=7(xix)2=2.877R2=0.999y=450.6 Calculate the concentration and the confidence interval of methane for an unknown sample that returned an average signal of 154mV ( 3 replicate samples)

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