paired t test and tukey post hoc test at p

نتایج جستجو برای: paired t test and tukey post hoc test at p

تعداد نتایج: 17539371 فیلتر نتایج به سال:

Effect of 10% Strontium Chloride and 5% Potassium Nitrate with Fluoride on Bleached Bovine Enamel

2017

Cristiane de Melo Alencar Victor Feliz Pedrinha Jesuína Lamartine Nogueira Araújo Renata Antunes Esteves Ana Daniela Silva da Silveira Cecy Martins Silva

BACKGROUND Dental whitening has been increasingly sought out to improve dental aesthetics, but may cause chemical and morphological changes in dental enamel surfaces. OBJECTIVE This study evaluated in vitro the effect of 10% strontium chloride and 5% potassium nitrate with fluoride on bovine enamel, through tristimulus colorimetry, Knoop microhardness (KHN), and roughness after bleaching with...

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تاثیر ساده سازی و شرح و تفصیل واژگانی متن های انگلیسی با اهداف ویژه بر درک مطلب دانش جویان مهندسی عمران دانشگاه شهید باهنر کرمان

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده ادبیات و علوم انسانی 1391

علی کاظمی, علی اصغر رستمی ابوسعیدی, محمد شریعتی,

تحقیق عملی از طریق ارائه سه متن رشته مهند سی عمران در سه شکل اصلی ( دست نخورده) ، ساده شده و مفصل به 359 دانشجوی رشته مهندسی عمران انجام شد و از طریق یک آزمون چهار گزینه ای 16 سوالی میزان درک مطلب مورد سنجش قرار گرفت. تحلیل داده ها از طریق آزمونهای تحلیل واریانس (one-way anova) و آزمون تعقیبی شف (post hoc test) صورت گرفت. نتایج نشان داد ساده سازی و شرح و تفصیل واژگان هر دو در ارتقاء درک مطلب مو...

15 صفحه اول

seroprevalence of parvovirus b19 antibodies in young women, sanandaj, iran

Journal: :iranian journal of virology 0

p sharifi department of microbiology, islamic azad university, sanandaj, iran m khodabandehloo mazaher-kh@muk.ac.ir b rahimiyan-zarif department of microbiology, faculty of medicine, cellular and molecular research center, kurdistan university of medical sciences, sanandaj, iran

background and aims: human parvovirus b19 may transmit to the fetus via the placenta during pregnancy and cause serious complications such as severe fetal anemia, non-immune hydrops fetalis, and even intrauterine fetal death. the aim of this study was to determine the seroprevalence of parvovirus b19 antibodies among young women, sanandaj, iran. materials and methods: ninety young women (15-40 ...

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اثر فعالیتهای پیش - شنیداری بر درک شنیداری

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1381

مهدی حیدر زاده, م رحیم پور, سرندی هدایت, روح الله زاهدی,

‏‎this study investigated the effect of prior knowledge on the listening comprehension performance of fl learners. twenty students, male and female, drawn from the two intact groups of the senior and junior english language and literature majors were chosen as the participants of this study . the two groups were then randomly assigned into the experimental and control group. the experimental gr...

15 صفحه اول

the effect of authentic listening materials on the listening proficiency of efl learners in the intermediate level

پایان نامه :0 1374

نگین احدبیک, پرویز بیرجندی,

having conducted the experiment and analysed the data, the researcher computed the groups mean scores and variances for the test relating to the research question. as the final atep, a t-test was conodonted for the hypothesis. as noted earlier, the significance level was determined at .05 and .01 respectively. the observed t-value was higher than the critical t-value at. 5 and .01 levels. conse...

15 صفحه اول

exploring motivation and english test preparation strategies of iranian pre-university candidates during and at the end of test preparation period for konkur examination

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و زبانهای خارجی 1393

اکرم محمدی, بهزاد قنسولی,

the current study aimed at investigating the relationship between motivation and test preparation strategies (tpss) used by iranian pre-university students in their preparation period for the university entrance exam (uee). due to the importance of uee in iran, this study also attempted to show its impact on these two important variables. to this end, 100 pre-university students in an iranian p...

the effect of caffeine and ephedrine supplement and their combination on maximal stregnth and muscular endurance in male bodybuilders

Journal: :علوم زیستی ورزشی 0

امیرحسین حقیقی دانشیار گروه فیزیولوژی ورزش دانشگاه حکیم سبزواری علی حشمتی کیا دانشگاه تربیت معلم سبزوار، کارشناس ارشد فیزیولوژی ورزش علیرضا حسینی کاخک دانشیار گروه فیزیولوژی ورزش دانشگاه حکیم سبزواری

the purpose of present study was to examine the effects of caffeine and ephedrine supplement and their combination on maximal strength and mucular endurance in male bodybuilders. 12 male bodybuilders (mean age: 24.41±4.42 years, height: 174.83±3.61 cm and weight: 75.67±8.05 kg) were selected voluntarily. the study design was crossover, in which the subjects were placed in 7 different conditions...

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Masticatory muscle activity in children with a skeletal or dentoalveolar open bite.

Journal: :European journal of orthodontics 2010

Tatiana dos Santos Ciccone de Faria Simone Cecilio Hallak Regalo Adilson Thomazinho Mathias Vitti Cláudia Maria de Felício

SUMMARY The aim of this study was to compare the electromyographic (EMG) characteristics of masticatory muscles in children with either a skeletal or dentoalveolar open bite, compared with a control group (CG). Forty-five children (31 boys and 14 girls), aged 6-11 years, were included in the study, 15 with a skeletal anterior open bite (SAOB), 15 with a dentoalveolar anterior open bite (DAOB), ...

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The Effect of Ramadan Fasting on Biochemical and Performance Parameters in Collegiate Wrestlers

Journal: Iranian Journal of Basic Medical Sciences 2012

Abolfazl Rezaei, Bahman Mirzaei, Farhad Rahmani-Nia Mahdi Ghahremani Moghadam Seyed Javad Ziyaolhagh

Objective(s)This study was designed to evaluate the effect of Ramadan fasting on body composition, aerobic and anaerobic power, strength, plasma lipids profile and serum glucose among collegiate wrestlers.Materials and Methods Fourteen male collegiate wrestlers (age, 20.12±2.5 yrs) volunteered as subjects for the study. Subjects were tested one week before the beginning of Ramadan, the last two...

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this thesis attempts to investigate the effects of prelistening activities on enhancing iranian efl learners` listening comprehension. the present study investigated ways in which learners` background knowledge could be activated in order to enhance their l2 listening comprehension by limiting the number of possible text interpretations prior to listening. the experiments conducted in this study examined the effect of prior knowledge and vocabulary teaching on iranian efl learners listening comprehension. the current study has two purposes: one is to investigate the effect of background knowledge on the second language listening comprehension of iranian intermediates and the other is to determine whether second language is facilitated by the introduction of unknown vocabularies in the form of prelistening activities. to conduct the study different instruments such as listening proficiency test and four listening tests such as pre and posttests were used and various statistical processes and techniques including paired-sample t-test, and analysis of variance (anova) were used. the findings of this study supported all three hypotheses tested. differences were found between the means of preteaching vocabulary variable, the background knowledge activation variable, and mean difference between these two strategies variable. subjects scored higher when the unknown words were taught in advance. likewise, subjects scored higher when they were asked some relevant questions about the topic than on those without them. there was, in addition, a significant difference between the means of preteaching vocabulary strategy and background knowledge activation strategy. in fact, preteaching vocabulary had a better effect in enhancing the students’ listening comprehension, in comparison to background knowledge activation strategy.

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1390

شیرین جوادی کما, بهدخت مال امیری,

this thesis attempts to investigate the effects of prelistening activities on enhancing iranian efl learners` listening comprehension. the present study investigated ways in which learners` background knowledge could be activated in order to enhance their l2 listening comprehension by limiting the number of possible text interpretations prior to listening. the experiments conducted in this stud...

15 صفحه اول

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