The calculated average for the validation sample is compared to the known value to determine the validity of the experimental procedure. The known [NO3] for NX is 4.60 mg/L. Which t-test should be used to determine if there is a statistically significant difference between the known value and the average experimental data from the previous question? |xm – xm2| > t* (sm² + sm)½ 1/½ |x – xm2| > t*s,„(1n, + n,)/n,n.)* - X > t*s_ "x – 1||

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