A sample is analyzed 10 times for cobalt concentration with a mean of 10.32 ppm and an absolute standard deviation of 1.13 ppm. Calculate the confidence interval at the 95% confidence level. Degree of Freedom 1 2 3 4 5 6 7 8 9 10 t Values at 95% CL 12.706 4.303 3.182 2.776 2.571 2.447 2.365 2.306 2.262 2.228

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