PROVNINGSJÄMFÖRELSE 2002 - 3 - ITM

Sample 3: The distribution is significantlyskew with tail towards higher values.Calculation of the mean according to Hubershould give a better value; mean valueaccording to Huber= 3.168 which is ~4.2%lower than calculated in the normal way).Samples 3 and 4: The share of systematicerrors is 75.3% which is high. The coefficientsof variation are on approximately the samelevel as for corresponding samples in 2001-6.TurbiditySamples 1 and 2: The share of systematicerrors is 72.7% which is higher thannormal.The coefficients of variation are inaverage higher than for corresponding samplesin 2001-6.Samples 3 and 4: The share of systematic errorsis 70.0% which is higher than normal. Thecoefficients of variation are in average on thesame level as for corresponding samples in2001-6.— 15 —