Campbell MK, Thomson S, Ramsay CR, MacLennan GS, Grimshaw JM: Sample size calculator for cluster randomised trials. Computers in Biology and Medicine. 2004, 34: 113-125. 10.1016/S0010-4825(03)00039-8. Article PubMed Google Scholar Donner A, Birkett N, Buck C: Randomization by cluster:...
Using the Raosoft sample size online calculator (http://www.raosoft.com/samplesize.html), a minimum sample size of 187 is needed to achieve a 6% margin of error, 90% confidence level, Sunway University and Sunway College population size of 22,000, and a 50% response distribution. Ethical ...
This program is a sample size calculator, and has an extensive help document, which has a section about design effect. Survey researchers might keep in mind that the “maximum error” has a default value of 0.5%. A more usual default value for behavioral surveys is 5%. Nutrition planning, ...
Effect Size Calculator—Cohen’s d, Cohen’s h, Phi(φ), R Squared, Eta Squared. Available online: https://www.statskingdom.com/effect-size-calculator.html (accessed on 12 December 2023). Zieliński, G.; Matysik-Woźniak, A.; Baszczowski, M.; Rapa, M.; Ginszt, M.; Pająk, ...
Required sample size of the initial survey was estimated with the freely available QualtricsXMSample Size Calculator (Provo, UT, USA) considering that, according to market research, 4.74% of the Spanish population between 15 and 64 years of age uses CLs, that is, about 1,500,000 wearers. ...
a cross-sectional study was carried out using an online survey. The Generalized Anxiety Disorder 7-item scale, The Patient Health Questionnaire (9-items), and the Connor–Davidson Resilience Scale were used to assess anxiety, depression, and resilience. The impact of COVID-19 was assessed using...
(p> 0.05). For boys, none of the studied factors (age, place of residence, BMI, physical activity level) was statistically significant determinant of food preferences (p< 0.05), while for girls, all of them were statistically significant determinants (p> 0.05). All the assessed factors (...
Body mass index (BMI) was calculated using the Center for Disease Control and Prevention (CDC) calculator; overweight was determined based on percentile ranks of the CDC growth charts, which are age and sex specific [40]. Socioeconomic status was measured using the Family Affluence Scale III (...