TY  - JOUR
TI  - Determination of the Sample Size on Different Independent K Group Comparisons by Power Analysis
AB  - The purpose of this study was to determine the number of samples that should be used in independent treatmentcomparisons with different effect sizes (0.25-3.0), the number of treatments (2-5), and the power of the test (70% -95%) insingle and multi-factor treatments. The material of the study was the random numbers drawn from the population that showsa normal distribution with N (0, 1) parameter. The power of the test was calculated by sampling with replacement from thepopulation and after the differences between the treatments in terms of standard deviation were established, 10000 simulationswere performed. This setup was carried out for experiments with one, two, and three factors. In the comparison of singlefactor independent treatment means, when the effect size was larger than Δ = 2 and the test power was between 70% and 95%,the sample sizes varied between 3 and 7. In the comparison of two-factor independent treatment means, when the effect sizewas larger than Δ = 2 and the test power was between 70% and 95%, the sample sizes varied between 2 and 3. In thecomparison of three-factor independent treatment means, when the effect size was larger than Δ= 1.5 and the test power wasbetween 70% and 95%, the sample size was 2. If all treatment comparisons were generalized; it was observed that when theeffect size increased, and the power of the test decreased, the sample size decreased In the t-test and F tests used in independenttreatment comparisons, a power analysis was performed under different situations, and the number of experimental units foreach 5% power increment between 70% and 95% were presented in tables. These tables, may help researchers to determinethe number of samples without power analysis in independent group comparison
AU  - ALTAY, Yasin
AU  - koskan, ozgur
AU  - ASLAN, Emre
DO  - 10.19159/tutad.792694
PY  - 2021
JO  - Türkiye Tarımsal Araştırmalar Dergisi
VL  - 8
IS  - 1
SN  - 2148-2306
SP  - 34
EP  - 41
DB  - TRDizin
UR  - http://search/yayin/detay/447606
ER  -