Calculation of mean particle diameter and standard deviation from sand, silt, and clay fractionsdoi:10.1016/0148-9062(92)90565-HELSEVIERInternational Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts
aEquations (1) to (4) can be derived from the approaches and formulas for the recursive calculation of mean, variance, and standard deviation in References 5 to 7. 式(1)对(4)在参考5到7可以从方法和惯例获得为手段、变化和标准偏差的递归演算。[translate]...
(c) and the standard deviation of the project, SD, the square root of the total of the variances of all critical activities : SD = √Sum of St2of Critical activities. (SD = 2.46 in the illustration above). Step 3; Calculate the deviation of the scheduled date Tsfrom the mean of the...
aStatistical calculation function (max., min., mean value, standard deviation, upper limit value, lower limit value, passed number, range, NG number), Offset compensation 统计演算作用 (最大, min.,平均值,标准偏差,上限价值,低限价值,通过数字,范围, NG数字),垂距报偿 [translate] ...
derivatives[x] # Automatic calculation of derivatives 2.0 >>> from uncertainties import unumpy # Array manipulation >>> varr = unumpy.uarray([1, 2], [0.1, 0.2]) >>> print(varr) [1.0+/-0.1 2.0+/-0.2] >>> print(varr.mean()) 1.50+/-0.11 >>> print(unumpy.cos(varr)) [...
First, let’s start with a statistical example. Let’s assume that the mean score for a class of 50 students is 60 and the standard deviation is 15 marks. A student named Emily asked the teacher if by scoring 70 she has performed well or not. Initially by looking at Emily’s score,...
For a setXofnitems:Sum of squares=∑i=0n(Xi−X‾)2where:Xi=Theithitem in the setX‾=The mean of all items in the set(Xi−X‾)=The deviation of each item from the meanFor a setXofnitems:Sum of squares=i=0∑n(Xi−X)2where:Xi=Theithitem in the setX=...
The Sortino ratio differs from the Sharpe ratio in that it only considers the standard deviation of the downside risk, rather than that of the entire (upside + downside) risk. Because the Sortino ratio focuses only on the negative deviation of a portfolio's returns from the mean, it is tho...
15 Cpk index and Calculation CPK Index and Calculation 1
Historical volatility (HV) is a statistical measure of thedispersionof returns for a given security ormarket indexover a given period of time. Generally, this measure is calculated by determining the average deviation from theaverage priceof a financial instrument in the given time period. Usingsta...