Median average deviation

Calculate all deviations (jc(i) - jc ), and sort according to absolute size calculate the median average deviation MAD calculate cut-off limits for outliers according to Huber i by assuming the recommended value for Huber s k (3.5). Different values for this multiplier can be selected. Display the cut-off limits and the clipped data set. 

Example The normality of a solution of sodium hydroxide as determined by an analyst by FOUR different titrations are found to be 0.5038 0.5049 0.5042 and 0.5039. Calculate the mean, median, average deviation, standard deviation and coefficient of variation. 

Excel 2000 provides 78 statistical functions, including functions that return the mean, median, maximum and minimum values, average deviation, standard... 

The use of probability paper for presenting porosimetry data has been shown to be quite useful. Firstly, it enables a deeper insight into the texture, by showing the statistical parameters, mode, median, average, standard deviation and distribution of pore size. Secondly, because the shape of the curves involved seems to be closely related to the morphology of the samples, thus giving additional information on the system. 

The suitabihty of the Gompertz fit to the cui ve can be assessed by comparing the values olb calculated from Eqs. (9-97) and (9-98), and, if suitable, the average value of b may be used in Eq. (9-99) to calculate the corresponding value of a to ensure a fit at the median and reasonable accuracy over the more important practical range within a couple of standard deviations on either side of the median. 

In general, air quality data are classified as a function of time, location, and magnitude. Several statistical parameters may be used to characterize a group of air pollution concentrations, including the arithmetic mean, the median, and the geometric mean. These parameters may be determined over averaging times of up to 1 year. In addition to these three parameters, a measure of the variability of a data set, such as the standard deviation... 

Change the reaction probability Pr(AB) to 1.0, and let the simulation run for 1000 iterations. At what time (what iteration) does reaction occur Repeat this simulation nine more times and tabulate the results. Find the average time and its standard deviation for your results, as well as the median time. Next change Pr(AB) to 0.05, increase the number of iterations for each run to 5000, and tabulate the results for 10 trial runs. Repeat the averaging process above. This study reveals the influence of the reaction probability on the course of the reaction. 

Theoretical calculations of unattached fractions of radon progeny require prediction of an attachment coefficient. Average attachment coefficients for aerosols of various count median diameters, CMD, and geometric standard deviations, ag, are calculated using four different theories. These theories are ... 

Chapter 7 Response 7.1 (a) The mean, standard deviation, robust average (median) and robust standard deviation (MADe) are shown in Table SAQ 7.1. Table SAQ 7.1 Data from a proficiency testing round for the determination of moisture in barley ... 

Like the median, neither of these ranges accounts for the numerical values of all the data only their relative magnitudes. The standard deviation, which is the square root of the variance, accounts for the individual magnitudes and is a measure of the average squared-deviation of individual values from the sample mean. If the individual values are denoted by j/j, j = 1,..., n and the sample mean by y, then the sample variance is... 

The measures of average that we commonly use are the mean and the median while the standard deviation provides us with our measure of patient-to-patient variation. 

The Mass Median Aerodynamic Diameter (MMAD) was reported as a lower limit of 0.8 pm and an upper limit of 1.2 pm for an average of 1.0 pm (pg 33 Hartman 1990). The Geometric Standard Deviation (GSD) was reported as a lower limit of 1.2 pm and an upper limit of 1.5 pm for an average of 1.35 or 1.4 pm. The Regional Deposited Dose Ratio (RDDR) from Table HI under the ER (Extrarespiratory effects) column is... 

Figure 21.1—Graphical illustration of the data presented in Table 21.1.To illustrate accuracy and precision, the standard deviations are calculated according to equation (21.8). Variations are indicated on the graph for arithmetic averages by a vertical bar and for the corresponding median values by arrows. For the results from chemist 3, the deviation between the mean and median is large. Chemist 1 has probably committed a systematic error. On the right is the classical target illustration of precision and accuracy. This image appears simpler than it is because there are uncertainties in x and y.

Radiochemical yields are within 46-74%. The average relative standard deviation of the method is 8%. The accuracy of the method was checked by analysis of a U. S. Geological Survey rock standard. Gallium concentrations in 101 coals, calculated from the concentration in the coal ash and the percentage of low-temperature ash in the coal, range from 1.1 to 7.5 ppm, the median value being between 2.9 and 3.0 ppm (16). 

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