It has been demonstrated that the worst performance rule (WPR) effect can occur as a result of statistical dependencies in data. Here, we examine whether this might also be case for Spearman's law diminishing returns (SLODR). Two proposed SLODR criteria are skewness estimated latent ability factor and correlation between within-individual residual variance. Using four publicly available dataset...

Financial derivatives have developed rapidly over the past few decades due to their risk-averse nature, with options being preferred financial flexible contractual mechanisms, particularly Asian options. The Black–Scholes stock option pricing model is often used in conjunction Monte Carlo simulations for pricing. However, assumes that volatility of asset returns constant, which does not square ...

Past evaluation of information retrieval algorithms has focused largely on achieving good average performance, without much regard for the stability or variance of retrieval results across queries. In fact, two algorithms that superficially appear to have equally desirable average precision performance can have very different stability or risk profiles. A prime example comes from query expansio...

Control charts for monitoring of process variance are developed based on Shewhart, exponentially weighted moving average (EWMA) and cumulative sum (CUSUM) control charts for mean. In all these variance control charts, log transformation of the sample variance is used. The design procedure of this chart is complex and it is poorly understood by the industry. In this paper a EWMA chart for monito...

The well-known approximation of the difference between the arithmetic average and geometric average returns as one-half of the variance of the underlying returns is reexamined using Jensen’s Inequality. The ”defect” in Jensen’s Indequality, is given an exlicit formula in terms of the variance following some ideas put forward by Holder. A new form of the AM-GM Inequality follows and is is applie...

collected data in animal breeding center of iran from 1983 to 2003 was used to estimate the genetic parameters of milk yield in iranian holstein cattle. genetic parameters were estimated, using single and three trait animal models. records of three lactations were divided into thre esub groups according to average milk yield, climitical regions and herd sizes. all variance components in the thr...