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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Among agronomists, there appears to be a confusion in selecting among standard deviation (SD), standard error (SE) and confidence interval (CI) in reporting their results as figures and graphs. If there is a confusion in selection among them, there should also be difficulties in interpreting results published in peer-reviewed journals. This review paper aims to help researchers better suited for reporting their results as well as interpreting others by revisiting the definition of SD, SE and CI and explaining in plain words the concepts behind the formula. A variation among observation obtained from an experiment can be explained by the use of SD, a descriptive statistic. If one wants to draw an attention to a variation observed among plant germplasm collected from different regions or countries, SD can be reported along with the mean so that readers can get an idea how much variation exists in the particular set of germplasm. When the purpose of reporting experiment results is about inferring true mean of the population, it is advised to use SE or CI, both inferential statistics. For example, a certain chemical compound is to be quantified from plant materials, estimated mean with SD does not tell the range where the true mean content of the chemical compound would lie. It merely indicates how variable the measured values were from replications. In this case, it would be better to report the mean with SE or CI. The author recommends the use of CI over SE since CI is a sort of adjusted SE.
The adjustment comes from t value that considers not only the probability but also n size.
목차
등록된 정보가 없습니다.
참고문헌 (7)
참고문헌 신청
Altman DG / 2005 / Standard deviations and standard errors / BMJ 331:903
Barde MP / 2012 / What to use to express the variability of data: Standard deviation or standard error of mean / Perspect. Clin. Res 3:113~116
Cumming G / 2007 / Error bars in experimental biology / J. Cell Biol 177:7~11
이동규 / 2015 / Standard deviation and standard error of the mean / Korean Journal of Anesthesiology 68(3):220~223
Nagele P / 2003 / Misuse of standard error of the mean (SEM) when reporting variability of a sample. A critical evaluation of four anaesthesia journals / Br. J. Anaesth 90:514~516
Barde MP / 2012 / What to use to express the variability of data: Standard deviation or standard error of mean / Perspect. Clin. Res 3:113~116
Cumming G / 2007 / Error bars in experimental biology / J. Cell Biol 177:7~11
이동규 / 2015 / Standard deviation and standard error of the mean / Korean Journal of Anesthesiology 68(3):220~223
Nagele P / 2003 / Misuse of standard error of the mean (SEM) when reporting variability of a sample. A critical evaluation of four anaesthesia journals / Br. J. Anaesth 90:514~516
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