نتایج جستجو برای: way anova test and tukey at p
تعداد نتایج: 17396610 فیلتر نتایج به سال:
this study was designed to investigate the impacts of teachers self-disclosure on students foreign language classroom anxiety, attitude to english language learning and their achievement scores at the end of the term. there were 48 female learners of intermediate level. they were not randomly selected. there were one experimental group with 21 students and one control group with 27 students.the...
building on previous studies on the effectiveness of different types of written corrective feedback, the present study aimed at investigating whether direct focused corrective feedback and direct unfocused corrective feedback produced any differential effects on the accurate use of english articles by efl learners across two different proficiency levels (low and high). in current study, the par...
AIM The aim of this study was to evaluate the fracture resistance of various provisional crown materials using an in vitro model test system. METHODS AND MATERIALS In the present study polycarbonate crowns, prefabricated by the manufacturer (3M Polycarbonate Crown), and the temporary crowns, fabricated in the dental laboratory environment, were fabricated using bis-acryl composite (Protemp II...
this study investigated the impact of explicit instruction of morphemic analysis and synthesis on the vocabulary development of the students. the participants were 90 junior high school students divided into two experimental groups and one control group. morphological awareness techniques (analysis/synthesis) and conventional techniques were used to teach vocabulary in the experimental groups a...
objective: this experimental in vitro study compared marginal adaptation of indirect composite, glass-ceramic inlays and direct composite. materials and methods: seventy-five recently extracted human molars were randomly divided into three groups (n=25) and mesio-occluso-distal cavities with the same dimensions were prepared in the teeth. indirect composite and glass-ceramic inlays were fabrica...
STATEMENT OF PROBLEM Dental fractures can occur in endodontically treated teeth restored with posts. PURPOSE The purpose of this study was to evaluate the in vitro fracture resistance of roots with glass-fiber and metal posts of different lengths. MATERIAL AND METHODS Sixty endodontically treated maxillary canines were embedded in acrylic resin, except for 4 mm of the cervical area, after r...
OBJECTIVE To evaluate the shear bond strength of orthodontic brackets bonded to bovine enamel using a new curing appliance composed of an LED cluster. DESIGN In vitro, laboratory study. MATERIALS AND METHODS Standard edgewise maxillary central incisor metal brackets (0.022'' slot) were bonded to 60 bovine incisors which were arranged in a parabola, simulating the dental arch. The arches wer...
We show that the one-way ANOVA and Tukey–Kramer (TK) tests agree on any sample with two groups. This result is based a simple identity connecting Fisher–Snedecor studentized probabilistic distributions proven without additional assumptions; in particular, standard assumptions (independence, normality, homoscedasticity (INAH)) are not needed. In contrast, it known for k>2 groups of observatio...
INTRODUCTION Nursing staffs expose to a high level of anxiety. This study aimed to compare the effect of Benson's relaxation and systematic desensitization methods for decreasing the anxiety score of nurses. MATERIALS AND METHODS In a randomized clinical trial, 72 female nurses were assigned randomly to three different groups. Benson's relaxation and systematic desensitization were used as in...
power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...
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