Descriptive statistics

2017 ◽  
Author(s):  
Andrew Gelman ◽  
Deborah Nolan
Keyword(s):  
Descriptive Statistics ◽  
Metabolic Rates ◽  
World Record ◽  
Linear Combinations ◽  
Record Times ◽  
Starting Point ◽  
Statistics Course ◽  
Scatter Plots ◽  
Economic Indexes ◽  
The Mean

Descriptive statistics is the typical starting point for a statistics course, and it can be tricky to teach because the material is more difficult than it first appears. The activities in this chapter focus more on the topics of data displays and transformations, rather than the mean, median, and standard deviation, which are covered easily in a textbook and on homework assignments. Specific topics include: distributions and handedness scores; extrapolation of time series and world record times for the mile run; linear combinations and economic indexes; scatter plots and exam scores; and logarithmic transformations and metabolic rates.

GAMBARAN BEBAN KERJA MENTAL PADA DOSEN FAKULTAS X UNIVERSITAS X

2019 ◽  
Vol 2 (3) ◽  
Author(s):  
Kartiani Dewi ◽  
Suryani S ◽  
Ahmad Yamin
Keyword(s):  
Community Service ◽  
Mental Workload ◽  
Sampling Technique ◽  
Mean Value ◽  
Descriptive Statistics ◽  
Large Contribution ◽  
Mean Dimension ◽  
The Mean ◽  
Quantitative Descriptive ◽  
University Lecturers

Lecturers are responsible for implementing the three main responsibilities in university (Tridharma Perguruan Tinggi) with 12 credits to 16 credits each semester. However, many lecturers feel that the workload is very excessive. The purpose of this study was to describe the mental workload of lecturers at the Faculty of X Padjadjaran University. The method of this research was quantitative descriptive by using a total sampling technique involving 43 lecturers. Data collection used NASA-TLX instruments. Data were analysed using descriptive statistics. The results of the study showed that overall the mental workload of the Faculty of X Padjadjaran University lecturers was included in the high category both in education and teaching assignments (74.4%), research assignments (76.7%), and community service assignments (74.4%). ) Effort dimensions have the highest mean value that is equal to 51.8, while the dimensions that have the lowest mean are Perfomance dimension, namely 9.4, where the greater the mean dimension shows the large contribution in the mental workload felt by the lecturer. The conclusions, this study show that most lecturers have a high mental workload. It is suggested that the lecturers need to have balance numbers of tasks according to their abilities, balance the time working with recreation, and meet the needs of rest. The results of this study need to be followed up by examining methods or efforts that can reduce the lecturers' mental workload.

scholarly journals BAYESIAN INFERENCE FOR THE TANGENT PORTFOLIO

2018 ◽  
Vol 21 (08) ◽  
pp. 1850054 ◽  
Author(s):  
DAVID BAUDER ◽  
TARAS BODNAR ◽  
STEPAN MAZUR ◽  
YAREMA OKHRIN
Keyword(s):  
Bayesian Inference ◽  
Point Of View ◽  
Posterior Distributions ◽  
Conditional Distributions ◽  
Linear Combinations ◽  
Conjugate Priors ◽  
Mean And Variance ◽  
The Mean ◽  
Stochastic Representations ◽  
Mean Vector

In this paper, we consider the estimation of the weights of tangent portfolios from the Bayesian point of view assuming normal conditional distributions of the logarithmic returns. For diffuse and conjugate priors for the mean vector and the covariance matrix, we derive stochastic representations for the posterior distributions of the weights of tangent portfolio and their linear combinations. Separately, we provide the mean and variance of the posterior distributions, which are of key importance for portfolio selection. The analytic results are evaluated within a simulation study, where the precision of coverage intervals is assessed.

Effect of altitude on dietary-induced thermogenesis at rest and during light exercise in man

1978 ◽  
Vol 45 (3) ◽  
pp. 345-349 ◽  
Author(s):  
M. J. Stock ◽  
N. G. Norgan ◽  
A. Ferro-Luzzi ◽  
E. Evans
Keyword(s):  
Metabolic Rate ◽  
Specific Dynamic Action ◽  
Metabolic Rates ◽  
Postprandial Metabolism ◽  
Interindividual Differences ◽  
Liquid Meal ◽  
The Mean ◽  
Monte Rosa ◽  
Hypoxic Exercise ◽  
Made In

Measurements of metabolic rate and the thermic response (specific dynamic action) of a 400-kcal liquid meal were made in six subjects at rest and during light exercise. The tests were conducted before (LA1) and after (LA2) a 3-wk sojourn (HA1, HA2, HA3) at 3,650 m on the Monte Rosa. Fasting metabolic rate at rest increased inittally and then fell, as did fasting and fed exercising metabolic rates. The fall in metabolic rates, but not the initial increases, can be ascribed to the change in body weight. Resting thermic responses at altitude were only slightly lower than normal, although peak values were significantly depressed at HA2 (P less than 0.05). The mean exercising thermic response was also significantly lower at HA2 (P less than 0.05) but recovered in HA3 and LA2. In the time taken for thermic responses to decrease and recover there were interindividual differences that were best explained by the previous altitude experience of the subjects. The possibility of a cardiovascular shift during hypoxic exercise causing depression of postprandial metabolism is discussed.

Statistical Analyses of High Cycle Fatigue French Data for Austenitic SS

2014 ◽  
Author(s):  
Géraud Blatman ◽  
Thomas Métais ◽  
Jean-Christophe Le Roux ◽  
Simon Cambier
Keyword(s):  
Strain Amplitude ◽  
High Cycle Fatigue ◽  
Experimental Testing ◽  
Austenitic Stainless Steels ◽  
Fatigue Curve ◽  
Statistical Analyses ◽  
Starting Point ◽  
The Mean ◽  
Number Of Cycles ◽  
Selection Of

In the 2009 version of the ASME BPV Code, a set of new design fatigue curves were proposed to cover the various steels of the code. These changes occurred in the wake of publications [1] showing that the mean air curve used to build the former ASME fatigue curve did not always represent accurately laboratory results. The starting point for the methodology to build the design curve is the mean air curve obtained through laboratory testing: coefficients are then applied to the mean air curve in order to bridge the gap between experimental testing and reactor conditions. These coefficients on the number of cycles and on the strain amplitude are equal to 12 and 2 respectively in the 2009 ASME BPV code, using the mean air curve proposal from NUREG/CR-6909 [1]. Internationally, with the same mean air curve, other proposals have emerged and especially in France [2]-[3] where a consensus seems to be reached on the reduction of the coefficient on strain amplitude. This paper provides statistical analyses of the experimental data obtained in France at high-cycle for austenitic stainless steels. It enables to bring arguments for the selection of a coefficient on strain amplitude in the French RCC-M code, where less scatter on the data is witnessed due to fewer material grades.

Correlates of Ageism Among Health Care Professionals Working With Older Adults

2018 ◽  
Vol 30 (3) ◽  
pp. 303-312 ◽  
Author(s):  
Ziyafet Uğurlu ◽  
Sultan Kav ◽  
Azize Karahan ◽  
Ebru Akgün Çıtak
Keyword(s):  
Older Adults ◽  
Health Care ◽  
Data Analysis ◽  
Health Care Professionals ◽  
Educational Status ◽  
Descriptive Study ◽  
Descriptive Statistics ◽  
The Mean ◽  
Student’S T ◽  
Student’S T Test

Introduction: The changing proportion of older adults in society necessitates the need to determine the attitudes of health care professionals toward older adults. The purpose of this study was to explore attitudes of ageism and its correlates among health care professionals working with older adults. Method: This descriptive study was conducted in seven hospitals in five cities in Turkey. A total of 628 health care professionals participated in this study. The Fraboni Scale of Ageism (FSA) was used to collect data. Descriptive statistics, student’s t test, one-way analysis of variance and multivariate linear regression were used for data analysis. Results: The mean total score from the FSA was 56.9 ( SD = 8.0). Education (β = −.18, p < .001) and difficulty with the care of older adults (β = −.10, p < .05) were statistically significant predictors of the FSA score. Conclusions: The attitudes of health care professionals toward older adults were generally positive and affected by difficulty in providing care and the educational status of the health care professionals.

scholarly journals Randomized response surface pathway design with skewed starting point and stochastic dose window

2020 ◽  
Vol 7 (1) ◽  
pp. 18
Author(s):  
Trond Holand ◽  
Øystein Evensen ◽  
Sagita Dewi ◽  
Stig Larsen
Keyword(s):  
Atlantic Salmon ◽  
Response Surface ◽  
Initial Dose ◽  
Salt Water ◽  
Lower Boundary ◽  
Response Variable ◽  
Ct Value ◽  
Starting Point ◽  
Starting Dose ◽  
The Mean

<p class="abstract"><strong>Background:</strong> The aim was to introduce response surface pathway (RSP)-design with skewed starting value and stochastic dose-window to estimate optimal efficacy dose (OED) of BP-C2 after IL-1β stimulation in Atlantic salmon.</p><p class="abstract"><strong>Methods:</strong> 54 healthy smolt of Atlantic salmon between 50 and 100 g before habituated to salt water were included. The study was conducted as a one-dimensional, randomized between-patient three-level RSP designed trial with one interventional- and one response variable and odd outcomes. The interventional variable was intraperitoneal injected BPC2 with skewed starting dose of 0.10 mg/100 g related to the initial dose-window &lt;0.02-0.5 mg/100 g. The response variable was the Ct-value of mRNA IL-1β expression 24 hours after injection.</p><p class="abstract"><strong>Results:</strong> Skewed starting value of 0.10 mg/100 g was chosen in the first design-level with a dose-window of &lt;0.0-0.20]. The three smolt obtained a reduction in Ct-value above 15%, and the dose-window adjusted with the lower boundary equals the previous dose. The five smolt at second design-level received 0.16 mg/100g with a dose-window [0.10-0.22]. Four smolt obtained above 15% and one of 0.5% reduction in cycle threshold (Ct)-value. Six smolt in the third design-level received 0.21 mg/100 g and one 0.16 mg/100 g. The mean Ct-value was reduced from 30.0 in the unstimulated situation to 25.0, 24.8 and 26.4 after BP-C2 stimulation of 0.10, 0.16 and 0.21 mg/100 g, respectively. The OED of BP-C2 related to IL-1β was estimated to 0.14 mg/100 g.</p><p class="abstract"><strong>Conclusions: </strong>Skewed starting value in the initial dose-window made the K-adjustment factor and dose-window stochastic. The RSP-procedure works in accordance to the expectation and estimated OED of BP-C2 sufficiently.</p><strong> </strong>

scholarly journals Teaching Wh-Question To Young Learners Through Picture For Sekami Of Paroki Roh Kudus Tomohon

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
J Tuilan
Keyword(s):  
Experimental Design ◽  
Descriptive Statistics ◽  
Objective Test ◽  
Young Learners ◽  
Post Test ◽  
The Subject ◽  
The Mean

This study intends to find out the effectiveness of using picture as teaching media in teaching WH-Question. The Subject consisted of 10 young aged students attending SEKAMI during the period November 2018 – February 2019. The data were collected through objective test pre-experimental design of one group pre-test post-test. The data were analyzed based on descriptive statistics, in which the mean of pre-test was compared to the mean of post-test. The finding shows that students improved their achievement after being treated with picture. The mean of post-test is higher than the mean of pre-test (X2 is higher than that of X1 = 82.5 > 61.5). This indicates that the use of picture as a teaching media was interesting and made the students easy to understand the situation that had been explained to them. Keywords: WH-Question, Young learners, teaching through picture.

scholarly journals Strengths among Contemporary Teenagers: A Comparative Study

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
Ritu Rani ◽  
Punam Midha ◽  
Ankita Budhiraja
Keyword(s):  
Harmonious Society ◽  
Descriptive Statistics ◽  
Female Adolescents ◽  
Male And Female ◽  
Signature Strengths ◽  
Fast Speed ◽  
The Mean ◽  
Mean Differences ◽  
Age Range ◽  
Purposive Sample

Male and female are two indispensible wheels of a chariot, thus both complement each other and this is a fact that without any one of them, it is just impossible to imagine the smooth continuation of the journey of life. India is a country where women were worshiped as Goddess. Though the society in which we live has been shaped historically by males. But recently the existing scenario appears to be changing with the realization of strengths among females. A harmonious society appears to be emerging with the fast speed of decline in gender-specificity. In order to empirically confirm these notions, the present researchers decided to explore and compare the profile of strengths of male-female adolescents. A test of Hindi adaptation of Value In Action (VIA) Inventory of Strengths for Youth by Shree and Singh (2013) was used. A purposive sample of 150 adolescents in which 75 were males and 75 were females with the age range of 13-17 years was drawn from Rohtak city, Haryana. The descriptive statistics was used to find out the mean differences in strengths of male and female adolescents. They differed to some extent in their profile of signature strengths. Further the profile of top five strengths also called “signature strengths”, the male and female differed in two out of five signature strengths. The similar signature strengths found in both male and female adolescents were such as judgment/critical thinking, appreciation of beauty and love, however they differed on two strengths such as zest and perspective were found in male while kindness and modesty were found in female. The inference drawn from the current study is that females are more humane than the male counterpart whereas males are found to be more courageous than females. The need to foster or enhance certain strengths in specific gender are discussed in the paper.

scholarly journals Modelling Bark Thickness of Norway Spruce (Picea abies Karst)

2019 ◽  
Vol 10 (2) ◽  
pp. 125-135
Author(s):  
Jusuf Musić ◽  
Velid Halilović ◽  
Jelena Knežević ◽  
Admir Avdagić ◽  
Aida Ibrahimspahić ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Bosnia And Herzegovina ◽  
Timber Harvesting ◽  
Bark Thickness ◽  
Optimal Model ◽  
Breast Height ◽  
Starting Point ◽  
Mean Diameter ◽  
The Mean ◽  
Actual Method

Background and Purpose: Bark thickness and its share in the volume of roundwood are the most important characteristics of the bark, particularly in the process of timber harvesting, and during scaling of processed logs. Therefore it is very important to have at disposal relatively accurate data regarding these characteristics of bark for particular tree species. The main goal of this paper is to investigate the thickness of the bark and its share in the volume of roundwood of Norway spruce. Materials and Methods: The research was carried out in the area of the Canton 10 of the Federation of Bosnia and Herzegovina and it encompassed 393 trees of Norway spruce from 10 cm to 115 cm of thickness at breast height. Measuring of the mean diameter and double thickness of bark was conducted by section method. In total, 4,647 diameters and bark thicknesses were measured in different relative lengths of stems or in average 10.6 measurements per one stem. Results: As an optimal model for the evaluation of double thickness of the bark of Norway spruce depending on mean diameter of roundwood the function with designated determination coefficient of 0.7142 was selected. The obtained results have confirmed the previously defined relations of investigate characteristics, which are as following: a) with the increase of mean diameter of roundwood (section) double bark thickness is increased from 9.26 mm (thickness class 12.5 cm) to 31.65 mm (thickness class 92.5 cm); b) with the increase of mean diameter of roundwood the share of bark in its volume decreased from 14.26% (thickness class 12.5 cm) to 6.73% (thickness class 92.5 cm). Conclusions: By the actual method of estimating bark thickness or the share of bark in the volume of roundwood of Norway spruce in the forestry of the Federation of Bosnia and Herzegovina a significant error was created which increases with the increase of mean diameter. The obtained results point to the necessity of investigation of these bark characteristics in Bosnia and Herzegovina and represent an inevitable starting point for making adequate tables of bark thickness and its percentage share in the volume of roundwood of Norway spruce.

scholarly journals AUDIT OF EVOLVING ROLES OF LAPAROSCOPY IN THE CURRENT SURGICAL PRACTICE AT CHRIS HANI BARAGWANATH ACADEMIC HOSPITAL: A 5 YEAR REVIEW

2021 ◽  
Vol 8 (5) ◽  
pp. 16-24
Keyword(s):  
Laparoscopic Cholecystectomy ◽  
Laparoscopic Surgery ◽  
Standard Of Care ◽  
Descriptive Statistics ◽  
Academic Hospital ◽  
Surgical Practice ◽  
The Past ◽  
Wide Range ◽  
Accepted Standard ◽  
The Mean

Background: Laparoscopic surgery (LS) is gaining momentum and has revolutionised the practice of surgery. Over the past thirty years, LS has been used to manage a wide range of surgical pathologies and has become a recognised and generally accepted standard of care. Aim: The aim of this study is to describe the evolution of LS in selected procedures.. Methods: Data were collected from theatre registries. Statistical analysis was performed using the software IMB SPSS. The data were analysed using descriptive statistics of mean and standard deviation for age, and percentage and frequencies for categories of variables . Results: Of the 3745 patients involved in the study, 59.1% were males and 40.9% were females. The mean age of the patients was 35.17±17.30 years. Laparoscopic surgery was represented in 43.2% of the procedures, with laparoscopic appendicectomy (46.73%) and laparoscopic cholecystectomy (32.69%) being the most commonly performed procedures.. Twenty-five adrenalectomies were performed over the study period, and of those 12 (52%) were performed laparoscopically. All the thymectomies (12) were performed thoracoscopically, with one conversion. Conclusion: The findings of this study suggest that there has been an increase in the overall incidence of laparoscopic surgery in selected procedures at CHBAH.

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