نتایج جستجو برای: paired sample t

تعداد نتایج: 1108460  

2000
Robert S. Nowak Robin J. Tausch

p s t m w t n p a g e r t A procedure to calculate probability limits for the inference that the absence of a taxon from a woodrat (Neotoma) midden implies bsence from the paleolandscape uses paired samples of modern egetation communities and paired samples of paleocommunities. ssumptions are: (1) each member of a sample pair is an indeendent measure of the same vegetation assemblage; (2) behav...

2012
Thang V. Pham Connie R. Jimenez

MOTIVATION Recent technology platforms in proteomics and genomics produce count data for quantitative analysis. Previous works on statistical significance analysis for count data have mainly focused on the independent sample setting, which does not cover the case where pairs of measurements are taken from individual patients before and after treatment. This experimental setting requires paired ...

Journal: :Open Journal of Stomatology 2022

Objectives: To study the biometric dimensions of upper front teeth in a Hong Kong SAR population including gender differences and compare this with often recommended use Golden Proportion when selecting tooth proportions. Methods: A sample dental casts was obtained from 100 patients: 50 females males an age range 18 to 35 years. The selected based on criteria intact maxillary anterior arches, f...

Journal: :Eduvest 2022

The purpose of research is to know about the effect assertive behavior depression on diabetes mellitus patients. This study used pre-experimental design with ao ne-group pre-post test t design. sample 1 7 people selected by purposive sampling technique. results showed that category before being given treatment mostly in moderate as many (64.7%), and after a decrease number be 9 ( 52.9 %). this ...

Journal: :Journal of AOAC International 2002
Douglas B Moore Nanc L Britton Robert L Smallidge Ken L Riter

An improved method for extraction and analysis of tiamulin is presented to address issues that arose during routine analysis of Type C medicated swine feeds under the current U.S. Food and Drug Administration-Center for Veterinary Medicine (FDA-CVM) approved method. The issues included the need for higher sample throughput and the ability to accommodate a wider variety of feed matrixes. Changes...

2016
Apratim Das Akanksha Kumari Indranil Chatterjee Himanshu Kumar

The present study aimed to examine the impact of first time users of amplification devices by participants having presbycusis on tinnitus. Pure tone Audiometry along with immittance audiometry and speech Audiometry was carried out. The Tinnitus handicap inventory (THI) questionnaire, developed by Newman et al. (1996), was administered in all participants for pre and post hearing aid fitting con...

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

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...

2013
J.C.F. de Winter

Researchers occasionally have to work with an extremely small sample size, defined herein as N ≤ 5. Some methodologists have cautioned against using the t-test when the sample size is extremely small, whereas others have suggested that using the t-test is feasible in such a case. The present simulation study estimated the Type I error rate and statistical power of the oneand two-sample ttests f...

2014
Bruce E. Trumbo Eric A. Suess

Graphical and numerical illustrations of the effects of moderate to severe rounding of normal data on the values of test statistics, actual significance level, and power for one-sample t tests and paired t tests. Goodness-of-fit tests confirm that rounded normal data are not normal. Combinatorial computations, simulations, and graphs are made using R. The level of programming, exposition, and s...

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