Given the following measurements of protein concentration in a urine sample : 4.2, 3.8, 3.9, 4.4, 4.0 g/dL calculate the mean, Standard Deviation and Standard Error. Also provide the range that corresponds to the probability of finding the mean at 95% confidence.
µ (population mean) = x̄(mean) ± ts/√n
Given t for 4 degrees of Freedom and 95% confidence = 2.776
Mean = 4.1 g/dL
Standard Deviation = 0.27 g/dL
Standard Error = 0.09 g/dL
Range = 3.92 - 4.28 g/dL