Tables for selecting sample size in correlation studies are presented. Some of the tables allow selection of sample size so that r (or r[squared], depending on the statistic the researcher plans to interpret) will be within a target interval around the population parameter with probability 0.95. The intervals are [plus or minus] 0.05, [plus or…

A core assumption of the standard multiple regression model is independence of residuals, the violation of which results in biased standard errors and test statistics. The structural equation model (SEM) generalizes the regression model in several key ways, but the SEM also assumes independence of residuals. The multilevel model (MLM) was…

Performances on tasks of phonemic manipulation, working memory, rapid naming, multisyllable word naming, receptive vocabulary and nonverbal intelligence were compared with decoding and spelling scores for 75 beginning readers. Multiple regression analysis revealed that phonemic manipulation accounted for the greatest amount of variance for both…

Objective: To investigate the risk factors for osteoporosis among a sample of middle-aged women. Methods: Adipose tissue and bone mineral density levels at the left femur, lumbar spine, and total body were assessed using dual-energy x-ray absorptiometry (DXA). Subjects (n=342) were surveyed regarding a variety of osteoporosis-related risk factors.…

Two common web-based surveys, "Is Online Learning Right for Me?' and "What Technical Skills Do I Need?", were combined into a single survey instrument and given to 228 on-campus and 83 distance education students. The students were enrolled in four different classes (business, computer information services, criminal justice, and…

In this study, using multiple regression analysis, we aimed to explore the factors related to acceptance of evolutionary theory among preservice Turkish biology teachers using conceptual ecology for biological evolution as a theoretical lens. We aimed to determine the extent to which we can account for the variance in acceptance of evolutionary…

Context: Few studies have examined hospitalization patterns among the uninsured, especially from the perspective of rural and urban differences. Purpose: To examine whether the patterns of uninsured hospitalizations differ in rural and urban hospitals and to identify the most prevalent and costly diagnoses among uninsured hospitalizations.…

The purpose of this study was to compare multiple regression with canonical analysis in order to introduce a new, policy relevant methodology to the literature on production functions. Findings from this study confirmed the results of past inquiries that found a relationship between the inputs to schooling and measures of student achievement. A…

Two methods of showing the ability of high school grades (high school grade point averages) and SAT scores to predict cumulative grades in different types of college courses were evaluated in a sample of 26 colleges. Each college contributed data from three cohorts of entering freshmen, and each cohort was followed for at least four years.…

A multivariate multiple regression analysis predicting the educational goal aspirations and expectations of 89 Mexican American high school students was examined based on Lent, Brown, and Hackett's (1994) Social Cognitive Career Theory and prior research findings with Mexican American samples. No gender or generational status differences were…

Purpose: The purpose of this paper is to examine the effects of participating in two domains, work and school, on the subjective wellbeing (SWB) and work-school conflict (WSC), as well as the moderating role of proactive coping between WSC and SWB among Nigerian nontraditional students. Design/methodology/approach: Using a cross-sectional survey,…

Recent data have shown that children of immigrant noncitizens experience more persistent and higher levels of food insecurity than the children of citizens following welfare reform. However, little is known about the range of factors that might explain different rates of food insecurity in the different populations. In this study, the authors used…

This paper examines the socio-cognitive processes underlying intentions to use condoms and contraceptive pills, using the Theory of Planned Behaviour extended with prototypes in a group of young Norwegian adolescents. The data are derived from a questionnaire survey comprising all pupils in Grade Nine at three schools in Oslo (n = 196). Using…

Background: Although breast cancer prevention should begin in youth, many young women are not aware of the modifiable lifestyle risk factors for the disease. Purpose: The purposes of this study were to examine the breast cancer-related knowledge, behaviors, and beliefs of young women; to determine whether knowledge about lifestyle risks was…

We estimate trends in intergenerational economic mobility by matching men in the Census to synthetic parents in the prior generation. We find that mobility increased from 1950 to 1980 but has declined sharply since 1980. While our estimator places greater weight on location effects than the standard intergenerational coefficient, the size of the…