Development of New LSD Formula when Numbers of Observations Are Unequal

Abstract

In the case of comparison between samples with unequal replications [n 1 # n 2 # n 3 # ••• # n k ], the statistician should use LSD (Least Significant Difference) many times to achieve these comparisons, this method consumes more time and effort. The purpose of this research is to find out a new method to do easy and reliable comparison between population means when the experiment or data involving different numbers of replications. In order to do this, a new formula was designed; the aim of this new formula is to develop the multiple comparisons into one step instead of doing it with many steps that consume more effort and time. In this work, the researcher used the mean of the replication number in the LDS formula instead of doing the calculation many times for each two means. The results of this study found that the new formula give similar results for multiple comparisons with minimal effort. It was concluded that the new formula (named Al-fahham's Formula) achieves the same results with less time and efforts. It was recommended that Al-fahham's Formula can be approved in the statistical textbooks and procedures.

Improving Nurses’ Proficiency In Providing Nursing Care For Pediatric Tonsillectomy

“…It was determined at P<0.05 and the results were shown as mean ± SD. ANOVA test was used to determine significant difference in the means of scores in nurses' proficiency in according to their socio-demographic characteristics (5). 4) explains that there is a significant relationship between overall scores of nurses' knowledge regarding nursing care of tonsillectomy and their hospital and age with a p-value less than 0.05, while there is a non-significant relationship with the other demographical data at p-value more than 0.05.…”

The Role Of Interleukin-17 In The Development And Severity Of Psoriasis

“…Chi-square were used to test dependence association between groups. ANOVA test was used to determine significant difference in IL-17 levels between patients' groups according to severity (8). The description of investigated groups was shown in table (1).…”

Cytogenetic Toxicity and Infertile Properties of the Aqueous Extract of Cucumis melo Seeds (Cucurbitaceae) in Male Zonocerus variegatus Cell Model (Orthoptera: Pyrgomorphidae)

“…Meiosis one is studied in this work because all the major and relevant events such as genetic mixings take place there at this time. Intrachromosomic shuffling or crossing-over, for example, takes place in prophase one of meiosis one [30,31]. Interchromosmic shuffling also takes place during meiosis one, precisely in metaphase and anaphase one [32].…”

“…The meiotic index is a relevant parameter of meiosis. It is used to measure the cytotoxicity of the extract, since it has been demonstrated that a meiotic index lower than 12.25±0.75% is a sign of cytotoxic inhibition whereas chromosomal abnormalities reflect genotoxicity [33,31]. The percentage of abnormalities in anaphase-1 (AI) is calculated according to the formula of [21] as follows: AI (%) = (AS, AR, MA, IA or AB)/Total number of cells analyzed in anaphase-1×100, with AS=Anaphase with stars; AR=Anaphase with stem chromosomes; MA=Multipolar Anaphase; IA (AP) =Anaphase with reversed poles; AB=Anaphase with chromosomal breaks.…”