On commutativity of projectors
It is shown that commutativity of two oblique projectors is equivalent with their product idempotency if both projectors are not necessarily Hermitian but orthogonal with respect to the same inner product.
A note on Anderson's note on a stationary autoregressive process
A form of the covariance matrix of a weakly stationary first-order autoregressive process is established.
Review: C. Radhakrishna Rao; Linear statistical inference and its applications
The article contains no abstract
Review: Stanisław Gnot - Estimation of variance components in linear models
The article contains no abstract
A note on Ahlers and Lewis' representation of the best linear unbiased estimator in the general Gauss-Markoff model
Likelihood and quasi - likelihood estimation of transition probabilities
In the paper two approaches to the problem of estimation of transition probabilities are considered. The approach by McCullagh and Nelder [5], based on the independent model and the quasi-likelihood function, is compared with the approach based on the marginal model and the standard likelihood function. The estimates following from these two approaches are illustrated on a simple example which was used by McCullagh and Nelder.
The estimation of parameters in a one-dimensional linear model with restrictions
The article contains no abstract
A remark on genotype selection in plant breeding projects
One of the main problems in plant breeding is the selection of the best genotypes. Most often the selection is made using yield as a main trait of continuous type, and ignoring the other traits of discrete type. Here, a simple procedure is proposed for dealing with the selection problem using not only the yield, but also an auxiliary discrete trait. The method is based on transforming the continuous variable into a discrete one and testing the dependence of variables with the use of contingency...
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