statistical methods in research ppt

Research Method.ppt 1 of 70 Research Method.ppt Feb. 01, 2010 169 likes 47,695 views Education Shama Follow Advertisement Advertisement Recommended Research in education Vijayalakshmi Murugesan 2.3k views 65 slides Research methodology Md Saifullah Khalid 7.1k views 32 slides Rm chapter 2 report cheppumol 535 views 10 slides  4 R $ KT XAYM( "n R $ SJqO& U "n R $ 2N[q dev. This analysis doesnt take into. 2023 SlideServe | Powered By DigitalOfficePro, - - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -. Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. Much more useful than correlation Allows prediction of values of Y rather than just whether there is a relationship between two variable. The SlideShare family just got bigger. Hidden error because cant be detected without a proper power analysis. qlrFFQ~]$M\I%?TI%)345 NKaa#>:Gc - Chapter 8: Introduction to Find the lower and upper confidence limits. Activate your 30 day free trialto continue reading. > g Teaching Assistants: Katie Tranbarger & Scott Spicer, Y or unravel reasons/causes of - MAS1401 Statistical Methods An Introduction to Statistical Methods used in the Agricultural and Biological Sciences Lecturer: Dr David Walshaw School of Mathematics Statistics 202: Statistical Aspects of Data Mining, - Statistics 202: Statistical Aspects of Data Mining Professor David Mease Tuesday, Thursday 9:00-10:15 AM Terman 156 Lecture 13 = Finish Chapter 5 and Chapter 8, - Title: CHAPTER 6: LINEAR PROGRAMMING Author: chen_zhimin Last modified by: user Created Date: 10/20/2004 1:00:08 PM Document presentation format. 63^*6oFhdBXP6mkw P_(axEknr_F.VpH^oEB~,xF.Yxl8goKNst=vq~A($rVqg$rQ/$K7v-yG_I/G?WyOKTk3QyIYzp-V^XtwR>sgZa~'C]A|#Ho52;ndYF{Z'#*h 0t`s?gai4 VUsB9. (n1 0?N) N!/(n1!n2! Often presented graphically as a 2 X 2 Table, Chi-Squared (2) Test Chi-Squared (2) Formula Not applicable in small samples If fewer than 5 observations per cell, use Fishers exact test, Correlation Assesses the linear relationship between two variables Example: height and weight Strength of the association is described by a correlation coefficient- r r = 0 - .2 low, probably meaningless r = .2 - .4 low, possible importance r = .4 - .6moderate correlation r = .6 - .8 high correlation r = .8 - 1 very high correlation Can be positive or negative Pearsons, Spearman correlation coefficient Tells nothing about causation, Correlation Source: Harris and Taylor. JMCON. then given by the fraction of these experiments in which two . Statistical Issues Designing Clinical Research - . All available places can be occupied in, Note However! P Values The probability that any observation is due to chance alone assuming that the null hypothesis is true Typically, an estimate that has a p value of 0.05 or less is considered to be statistically significant or unlikely to occur due to chance alone. The decision-maker for desk-rejecting a manuscript, Acceptable standard for English language quality, Retraction of articles and how authors should handle it. diana trandabat 2013-2014. the sentence as a string of words e.g i saw the lady with. Basics stat ppt-types of data Farhana Shaheen 23.3k views Null hypothesis AND ALTERNAT HYPOTHESIS ADESH MEDICAL COLLEGE 53.5k views Presentation of data Ruby Ocenar 256k views Research Design gaurav22 401.8k views Standard deviation P. G. Department of Botany, Berhampur University 82.6k views Chi squared test Dhruv Patel 6.4k views By accepting, you agree to the updated privacy policy. As N increases, the mean value increases ? By accepting, you agree to the updated privacy policy. d d @ @@ `` H ( c Do not sell or share my personal information, 1. She is currently a Learning / Research Analyst, working in the Centre for Learning Environment and Assessment Development (CoLEAD) at Singapore Institute of Technology (SIT). Practical Statistics for Medical Research, Correlation Correlation Coefficient .3 Correlation Coefficient 0 Source: Altman. Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. PowerShow.com is a leading presentation sharing website. - Chapter 1: Introduction and Research Methods What is Psychology? Statistics presents a rigorous scientific method for gaining insight into data. the spread of the u values about the mean u. Weve updated our privacy policy so that we are compliant with changing global privacy regulations and to provide you with insight into the limited ways in which we use your data. Clearly, m n1 n2, so ltmgt ltn1gt - ltn2gt N( p, So, if p q , ltmgt 0 so, ltxgt ltmgtl 0, Question 3 What is the dispersion (or variance), That is, what is the spread in n1 values about, So, we first need to calculate the quantity, Use a similar trick as we did before note, After algebra (in the book) using p q 1, we, So, finally, using lt(?n1)2gt lt(n1)2gt - (ltn1gt)2, This is the dispersion or variance of the, The root mean square (rms) deviation from the, (?n1) ? +KRs8@f Pdk )px!` mC#07jd}c^ ! ? The unit staff provide advice about what to do and how to do it as well as . biostatistics 212. today. christopher s. coffey. Sample Size Calculation Also called power analysis. Looks like youve clipped this slide to already. In doing so, the statistician seeks to limit bias, maximize objectivity, and obtain results that are scientifically valid. If a confidence interval range is very wide, then plausible value might range from very low to very high. Sample Mean Most commonly used measure of central tendency Best applied in normally distributed continuous data. The independent variable usually occurs earlier in time than the dependent variables. 2022 in a Nutshell Reminiscing the year when opportunities were seized and feats were achieved! We've updated our privacy policy. Our product offerings include millions of PowerPoint templates, diagrams, animated 3D characters and more. large data, Statistical Methods - . charles e. mcculloch division of biostatistics. The mean value of the deviation from the mean, Now, lets look at (?u)2 (u - ltugt)2 (square of, Its mean value is lt(?u)2gt lt(u - ltugt)2gt, ltu2gt - 2ltugtltugt (ltugt)2 ltu2gt - (ltugt)2, This is called the Mean Square Deviation (from. We've updated our privacy policy. ? Test about a slope. The function of statistics in research is to purpose as a tool in conniving research, analyzing its data and portrayal of conclusions there from. Activate your 30 day free trialto unlock unlimited reading. Interquartile range Is the range of data from the 25th percentile to the 75th percentile Common component of a box and whiskers plot It is the box, and the line across the box is the median or middle value Rarely, mean will also be displayed. Large data sets (Corpora) of natural languages allow using statistical methods that were not possible before Brown Corpus includes about 1000000 words with POS Uploaded on Jan 02, 2020 Kimberly A Buchanan + Follow probabilities 5 chance estimating probabilities lexical categories large data sets flies 21 44 0 Table of contents Methods for collecting data Examples of data collection methods Methods for analyzing data Clinical Research Methods - . ? Remember there is variability among samples- they might seem to come from different populations but they may not. We model patterns in the data in such a way to account for randomness and uncertainty in the observations, and then draw inferences about the process or population being studied. - PowerPoint PPT presentation Number of Views: 637 Avg rating:3.0/5.0 Slides: 67 Provided by: Charles7 Also called a error. Each has, A molecule travels in 3 dimensions with a mean, The techniques used are Powerful General. More than one method is . The SlideShare family just got bigger. Similarly, we can, Of course, ltn1gt ltn2gt N(p q) N as it. The P value used is an arbitrary value P value of 0.05 equals 1 in 20 chance P value of 0.01 equals 1 in 100 chance P value of 0.001 equals 1 in 1000 chance. 2. Standard Error A fundamental goal of statistical analysis is to estimate a parameter of a population based on a sample The values of a specific variable from a sample are an estimate of the entire population of individuals who might have been eligible for the study. The SlideShare family just got bigger. When the sample size is small, the estimation and testing procedures of Chapter 8 are not appropriate. lt(?n1)2gt (in general). Descriptive Statistics Descriptive statistics are methods for organizing and summarizing data. Example: A relative risk of 4 might have a confidence interval of 1.05 to 9, suggesting that although the estimate is for a 400% increased risk, an increased risk of 5% to 900% is plausible. CrystalGraphics 3D Character Slides for PowerPoint, - CrystalGraphics 3D Character Slides for PowerPoint, - Beautifully designed chart and diagram s for PowerPoint with visually stunning graphics and animation effects. The probability of not making a Type II error is 1 - , which is called the power of the test. chapter 7(7.1 &7.2): theory and application of the, An Intensive Course in Clinical Research Methods - . u " descriptive statistics inferential statistics. Spies M.D., MPH Professor of Radiology Georgetown University School of Medicine Washington, DC. CCPR offers "drop-in" statistical consulting services to meet short-term needs of CCPR affiliates. - CHAPTER 3 Review of Statistics INTRODUCTION The creation of histograms and probability distributions from empirical data. Weve updated our privacy policy so that we are compliant with changing global privacy regulations and to provide you with insight into the limited ways in which we use your data. February 13, 2010. Statistical methods in NLP - . We've encountered a problem, please try again. ? This can be easily generalized to 2 dimensions. )pn1qn2 ? This may lead to a negative study outcome in error. ! " Introduction Observational Data Descriptive statistics involve summarizing a collection of data. collecting and describing data. And theyre ready for you to use in your PowerPoint presentations the moment you need them. (n1 0?N) N!/(n1! ? Slide 1. But m 2n1 N, so n1 ()(N, n2 N - n1 ()(N - m). course overview course. Mid-value in interquartile range. Now customize the name of a clipboard to store your clips. Talk about Probabilities Average Properties, We are NOT concerned with the detailed behavior, An Isolated System is in Equilibrium when its, But, note! Example: A company advertises the net weight of its cereal is 24 ounces. course overview course, Introduction to Statistical Computing in Clinical Research - . Medical Statistics Made Easy, Correlation Perfect Correlation Source: Altman. It appears that you have an ad-blocker running. 3. methods research methods quantitative methods qualitative methods mathematical statistical methods interviews structured semi structured Download Presentation Research Methods An Image/Link below is provided (as is) to download presentation They are all artistically enhanced with visually stunning color, shadow and lighting effects. Most research studies result in a extensive. Looks like youve clipped this slide to already. Standard Error Standard error of the mean Standard deviation / square root of (sample size) (if sample greater than 60) Standard error of the proportion Square root of (proportion X 1 - proportion) / n) Important: dependent on sample size Larger the sample, the smaller the standard error. Chapter 2 - Summary. Clarification Standard Deviation measures the variability or spread of the data in an individual sample. Dr. Shamanthakamani Narendran M.D. (Ensemble the French word for assembly). Statistical methods assist in classification in four ways: in devising probability models for data and classes so that probable classifications for a given set of data can be identified; in developing tests of validity of particular classes produced by a classification scheme; in comparing different classification schemes for effectiveness; and N. lt(?m)2gt lt(m - ltmgt)2gt in the net displacement? The sample is chosen by selecting a random starting point and then picking every i th element in succession from the sampling frame. Types of data Continuous data Theoretically infinite possible values (within physiologic limits) , including fractional values Height, age, weight Can be interval Interval between measures has meaning. Enjoy access to millions of ebooks, audiobooks, magazines, and more from Scribd. Sample Median Used to indicate the average in a skewed population Often reported with the mean If the mean and the median are the same, sample is normally distributed. If so, share your PPT presentation slides online with PowerShow.com. Whatever your area of interest, here youll be able to find and view presentations youll love and possibly download. And, best of all, it is completely free and easy to use. B^uuhm?}{].~}v_J;xogJY]@.)oqC? 3. - CHAPTER 2 Research Methods in Industrial/Organizational Psychology Introduction to Industrial/Organizational Psychology by Ronald Riggio Social Scientific Research Chapter%207%20Sampling%20and%20Sampling%20Distributions. marcia a. testa, mph. Sample Mode Infrequently reported as a value in studies. Free access to premium services like Tuneln, Mubi and more. Clipping is a handy way to collect important slides you want to go back to later. biostatistics 212 lecture 1. today. ; The sampling interval, i, is determined by dividing the population size N by . Clinical Investigation and Outcomes Research Statistical Issues in Designing Clinical Research - . need to solve. Typically 0.05 is used, Errors Type II error Claiming there is no difference between two samples when in fact there is. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. Introduction We are focusing on "quantitative analysis" The general idea is to summarize and analyze data so that it is useful for decision-making We do this by calculating "measures of central tendency" and by looking for relationships (We will NOT cover formal tests of hypotheses) Primary vs. secondary data sources Data on uses Methods of Collecting Data biomedical Signal processing ???????? Instant access to millions of ebooks, audiobooks, magazines, podcasts and more. - Chapter 9. The aim of this study was to compare PPT and traditional lecture method in material understandability, effectiveness and attitude among university students. Ist Yr MSc(N) The type of data defines: The summary measures used Mean, Standard deviation for continuous data Proportions for discrete data Statistics used for analysis: Examples: T-test for normally distributed continuous Wilcoxon Rank Sum for non-normally distributed continuous, Descriptive Statistics Characterize data set Graphical presentation Histograms Frequency distribution Box and whiskers plot Numeric description Mean, median, SD, interquartile range, HistogramContinuous Data No segmentation of data into groups, Frequency Distribution Segmentation of data into groups Discrete or continuous data, Box and Whisker Plots Popular in Epidemiologic Studies Useful for presenting comparative data graphically, Numeric Descriptive Statistics Measures of central tendency of data Mean Median Mode Measures of variability of data Standard Deviation Interquartile range. Statistical methods are essential for scientific research. REACH Resources | Informing more effective humanitarian action Qualitative Vs. Quantitative Research A step-wise guide to conduct research. Even if its Macroscopic parameters, Section 1.1 Elementary Statistical Concepts, Some math preliminaries ( methods) for the next, To treat statistical physics problems, we must, Keep in mind Whenever we want to describe a. Many of them are also animated. Spies M.D., MPH Professor of Radiology Georgetown University School of Medicine Washington, DC, Overview Data types Summarizing data using descriptive statistics Standard error Confidence Intervals, Overview P values One vs two tailed tests Alpha and Beta errors Sample size considerations and power analysis Statistics for comparing 2 or more groups with continuous data Non-parametric tests, Overview Regression and Correlation Risk Ratios and Odds Ratios Survival Analysis Cox Regression, Further Study Medical Statistics Made Easy M. Harris and G. Taylor Informa Healthcare UK Distributed in US by: Taylor and Francis 6000 Broken Sound Parkway, NW Suite 300 Boca Raton, FL 33487 1-800-272-7737. Free access to premium services like Tuneln, Mubi and more. 3 !1AQa"q2B#$Rb34rC%Scs5&DTdEt6UeuF'Vfv7GWgw 5 !1AQaq"2B#R3$brCScs4%&5DTdEU6teuFVfv'7GWgw ? Chapter 1: Introduction to Statistical Methods Description: . We've updated our privacy policy. For example, tables or graphs are used to organize data, and descriptive values such as the average score are used to summarize data. Data presentation. So, lt(?m)2gt 4lt(?n1)2gt, Summary 1 Dimensional Random Walk Problem, Probability Distribution is Binomial WN(n1), Mean number of steps to the right ltn1gt Np. I am looking for Editing/ Proofreading services for my manuscript

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