Results 271 to 280 of about 8,978,019 (319)
Some of the next articles are maybe not open access.
The American Statistician, 2003
Conventionally, sample size calculations are viewed as calculations determining the right number of subjects needed for a study. Such calculations follow the classical paradigm: for a difference X, I need sample size Y. We argue that the paradigm for a sample size Y, I get information Z is more appropriate for many studies and reflects the information ...
Parker R.A., Berman N.G.
openaire +2 more sources
Conventionally, sample size calculations are viewed as calculations determining the right number of subjects needed for a study. Such calculations follow the classical paradigm: for a difference X, I need sample size Y. We argue that the paradigm for a sample size Y, I get information Z is more appropriate for many studies and reflects the information ...
Parker R.A., Berman N.G.
openaire +2 more sources
Archives of Pediatrics & Adolescent Medicine, 1988
Before undertaking a research comparison, investigators may wish to estimate the sample sizes needed to assure that the research is feasible and is worth the effort and expense. Such calculations require several decisions by the researchers: (1) the acceptable level of the type I error (P value), (2) the desired power of the test, (3) the difference ...
openaire +2 more sources
Before undertaking a research comparison, investigators may wish to estimate the sample sizes needed to assure that the research is feasible and is worth the effort and expense. Such calculations require several decisions by the researchers: (1) the acceptable level of the type I error (P value), (2) the desired power of the test, (3) the difference ...
openaire +2 more sources
Annals of Internal Medicine, 1983
Excerpt To the editor: The nomograms described by Young and associates (1) enable rapid estimation of sample size appropriate for study of an hypothesis.
openaire +2 more sources
Excerpt To the editor: The nomograms described by Young and associates (1) enable rapid estimation of sample size appropriate for study of an hypothesis.
openaire +2 more sources
BMJ, 2010
A randomised controlled trial investigated whether a computerised feedback device modified eating behaviour and resulted in weight loss in obese adolescents.1 The primary outcome was change in body mass index (BMI) from recruitment to 12 months. BMI was calculated as weight (kg)/[height (m)]2, adjusted for age and sex.
openaire +3 more sources
A randomised controlled trial investigated whether a computerised feedback device modified eating behaviour and resulted in weight loss in obese adolescents.1 The primary outcome was change in body mass index (BMI) from recruitment to 12 months. BMI was calculated as weight (kg)/[height (m)]2, adjusted for age and sex.
openaire +3 more sources