The Chi-Square test (χ 2 test) is a family of tests based on a series of assumptions and is frequently used in the statistical analysis of experimental data. The aim of our paper was to present solutions to common problems when applying the Chi-square tests for testing goodness-of-fit, homogeneity and independence. The main characteristics of these three tests are presented along with various p...

Noncentral chi-square distributions play an important role in statistics. They occur for instance as exact or limiting distributions of test statistics under alternatives. To examine the power functions of such tests we come across the problem of comparing distribution functions of noncentral chi-square variables. In this section inequalities are presented, which make such a comparison possible...

   The purpose of the present paper is to peruse the internet addiction position and also examined the relationship between the internet addiction and age, gender, and marital status. The statistical group consists of the university students at Islamic Azad University in Babol in 2015, which have access to the internet connection with utilizing a simple random sampling technique. Moreover, base...

BACKGROUND Several studies have reported that medical sciences students are usually dealing with severe stress. However, no study is available on ways of coping in medical sciences students in Iran. As socio-cultural factors may affect the students' responses toward stress, this study aimed to investigate the stressors and ways of coping among students of Guilan University of Medical Sciences (...