Robust extreme double ranked set sampling

As a well-known method for selecting representative samples of populations, ranked set sampling (RSS) has been considered increasingly in recent years. This (RSS) method has proved to be more efficient than the usual simple random sampling (SRS) for estimating most of the population parameters. In order to have a more efficient estimate of the population mean, a new sampling scheme called as robust extreme double ranked set sampling (REDRSS) is introduced and investigated in this paper. A simulation study shows that using REDRSS scheme gives more efficient estimates of population mean with smaller variance than the usual SRS, RSS and most other sampling schemes based on RSS estimators in non-uniform (symmetric or non-symmetric) distributions.     

Quality of life and sexual function in postmenopausal women

This study examined the relationship between quality of life (QoL) and sexual function among postmenopausal women. As a cross-sectional study, it was conducted among 405 postmenopausal women selected using a multistage sampling method. The data-collection tools were the Female Sexual Function Index (FSFI) questionnaire, the WHO Quality of Life-BREF (WHOQOL-BREF) questionnaire, and a researcher-administered questionnaire. Sexual dysfunction was observed in 61% of the participants. The total scores of FSFI had a positive correlation with the WHOQOL-BREF total scores and all QoL domain scores. Therefore, sexual function needs to be covered by health-care packages aiming to improve postmenopausal women’s QoL.