نتایج جستجو برای: independent sample t

تعداد نتایج: 1456032  

Journal: :Psychonomic bulletin & review 2007
Natalie A Obrecht Gretchen B Chapman Rochel Gelman

Normatively, a statistical pairwise comparison is a function of the mean, standard deviation (SD), and sample size of the data. In our experiment, 203 undergraduates compared product pairs and judged their confidence thatone product was better than the other. We experimentally manipulated (within subjects) theaverage productratings, the number of raters (sample size), and the SD of the ratings....

2012
Kyung Do Han Yong Gyu Park

One of the simplest and most widely used multiple comparison tests is the Bonferroni adjustment (test). It is applicable to the following situations: 1) Regardless of whether or not the sample sizes of each group are equal. 2) When the family of interest is the particular set of comparisons (not all pair-wise comparisons). We can easily obtain the results of the Bonferroni comparison by multipl...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1393

چکیده مقدمه: در ناحیه دهان و فک و صورت عوامل گوناگونی از جمله تروما و پاتولوژی ها می توانند منجر به از دست رفتن بافت های موضع شوند. در این موارد ممکن است نیاز به بازسازی نواقص ایجاد شده در کف دهان، زبان، کام، استخوان آلوئولار و یا نواحی از اوروفارنکس باشد که برای این منظور از روش های مختلفی می توان استفاده نمود. یکی از شایعترین روش های بازسازی استفاده از انواع فلپ های عضلانی- مخاطی مانند فلپ ه...

Journal: :Kybernetika 1998
Jirí Andel Jaromír Antoch

Let (X\) Yi)',... ,(-Xn, Yny be a sample from a bivariate regular normal distribution with independent components. If r' is the sample correlation coefficient then it is known that Er = 0, varr' = + 0 ( n ~ f ) (1.1) n (see Cramer [4], § 27.8 and § 29.7). If {Xt} and {Yt} are independent time series then the variance of the sample correlation coefficient does not obey the formula (1.1). Let {et...

Journal: :Stochastic Processes and their Applications 2023

Let Z(t)=(Z1(t),…,Zd(t))⊤,t∈R where Zi(t),t∈R, i=1,…,d are mutually independent centered Gaussian processes with continuous sample paths a.s. and stationary increments. For X(t)=AZ(t),t∈R, A is a nonsingular d×d real-valued matrix, u,c∈Rd T>0 we derive tight bounds for P∃t∈[0,T]:∩i=1d{Xi(t)−cit>ui}and find exact asymptotics as (u1,…,ud)⊤=(ua1,…,uad)⊤ any (a1,…,ad)⊤∈Rd∖(−∞,0]d u→∞.

Journal: :Public health nutrition 2015
Robert P Hamlin Lisa S McNeill Vanessa Moore

OBJECTIVE The present research was an experimental test that aimed to quantify the impact of two dominant front-of-pack (FOP) nutritional label formats on consumer evaluations of food products that carried them. The two FOP label types tested were the traffic light label and the Percentage Daily Intake. DESIGN A 4×5 partially replicated Latin square design was used that allowed the impact of ...

Journal: :American sociological review 2007
Steven Ruggles

In the mid-nineteenth century, almost 70 percent of persons age 65 or older resided with their adult children; by the end of the twentieth century, fewer than 15 percent did so. Many scholars have argued that the simplification of the living arrangements of the aged resulted primarily from an increase in their resources, which enabled increasing numbers of elders to afford independent living. T...

Journal: :Urecol Journal Part A Education and Training 2022

The purpose of this study was to determine how the influence Auditory, Intellectually, Repetition learning model can increase motivation grade 5 students in social studies subjects at MI Muhammadiyah Salafiyah Bandongan. method used is a pre-experiment using one-group pretest-posttest design. population and sample 15 class analysis an independent t-test SPSS 25.00 program for windows. Based on ...

2017
Drew FRALICK Julia Z. ZHENG Bokai Wang Xin M. TU Changyong FENG

In clinical research, comparisons of the results from experimental and control groups are often encountered. The two-sample t-test (also called independent samples t-test) and the paired t-test are probably the most widely used tests in statistics for the comparison of mean values between two samples. However, confusion exists with regard to the use of the two test methods, resulting in their i...

Journal: :مدیریت ورزشی 0
اکرم راشد کارشناس ارشد دانشگاه شمال فضل اله زارعپور نصیرآبادی دانشجوی دکتری دانشگاه آزاد علوم و تحقیقات کرمان

the aim of this research was to explain the difference in the dimensions of learning organization between federations of team and individual sports. this research was a comparative survey. the statistical population consisted of 795 fulltime employees of iran sport federations. out of 212 returned questionnaires, 158 questioners were from individual sport federations and 54 from team sport fede...

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