The simple samples are independently taken from normal distribution. The two functions of the sample means and sample variances are considered. The density functions of these two statistics have been derived. These statistics can be applied for verifying the hypothesis on stability of expected...

The objective of this paper is to formulate a standard set of stochastic assumptions for a prediction method which consists in a linear extrapolation of the mean empirical growth. The author shows how to derive formulas for the mean error of prediction (the ex ante prediction error). These...

An S-T-R system (Sender–Transportation–Receiver) with multi-component continuous transportation is considered. Until now systems of this type were studied in which damage parameters of separate units of transportation were identical (so-called homogenous transportation). In this paper, the...

The aim of this article is presentation of logit and probit models and their wide application in many different science. Logit and probit regression are used for analyzing the relationship between one or more independent variables with categorical dependent variable. There are a lot of...

The paper analyses long-run relationships between terms of trade, money and current account for Italy in the period from the first quarter of 1975 to the first quarter of 2001.

The main purpose of this research is to examine the different factors affecting the predictive power of bankruptcy models as for example: the way of defining “bankruptcy”, the elimination, or not of the multicollinearity appearing in formalized model, the stability of time-related financial...

Real option valuation methods used in firm valuation process allow taking into consideration firm’s flexibility and its adaptability to environmental changes. In the binomial tree model it is assumed that stock price changes are composed of a great number of small binomial changes. This...

Classical power analysis does not involve preferences of players (parties). Classical power indices are constructed under assumption of equal probability of occurrence for each coalition. The paper contains a proposition of relaxation of this assumption, based on extended Shapley–Shubik power...

A review of results concerning the problem of sampling based on ranked sets is presented. From an infinite or finite population n independent samples of n elements each are drawn. The samples are ranked and then n elements are chosen to be measured.

The multidimensional stock control that functions in a random Markov environment is considered. The mathematical formalization of this model was considered with the use of sums of the random variables defined on the Markov chains. The authors introduce a definition of risk function of the type...