STATISTICAL TOOLS NEEDED IN ANALYZING TEST RESULTS Prof. Yonardo Agustin Gabuyo Example All the students who took the examination, got scores above the mean. Download Statistics PowerPoint templates (ppt) and Google Slides themes to create awesome presentations. It is used for collection, summarization, presentation and analysis of data. This conjecture may or may not be true. Looks like you’ve clipped this slide to already. Statistical Hypothesis Testing PPT (The Test of Hypothesis / Significance – Tips and Procedure) What is Hypothesis Testing? A hypothesis defined as a proposition placed under examination. 1 2 10.2. Confidence Limit. Max. Statistical Tables Z-distribution t 0.93. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 1 21.56 2 27.25 3 25.53 4 24.99 24.43. There are two types of random variables: discrete and continuous. Learn more about this topic on our page about standard deviation. Within statistical theory, randomness and uncertainty are modelled by … To find the maximum value, use the MAX function. In this course you will learn the basics of statistics; not just how to calculate them, but also how to evaluate them. the mean reduction from baseline in the 5 deg lateral insole group (0.9) the mean reduction from baseline in the flat insole group (1.2) the difference between the two groups in mean change from baseline (0.9 – 1.2 = -0.3) •We can see that there was some reduction in pain in both groups and Make sure the terms of art and statistical terms that you do use in your report are used correctly. What is a mean? Statistical theory defines a statistic as a function of a sample where the function itself is independent of the sample’s distribution. Winner of the Standing Ovation Award for “Best PowerPoint Templates” from Presentations Magazine. CEC values (in cmol/kg) of a control sample determined by two analysts. When people talk about statistical averages, they are referring to the mean. From among the measures of dispersion, variance and its square root (the standard deviation) are the most of ten used measures. Tests concerned with using selected sample data compared with population data in a variety of ways are called inferen- tial statistical tests. 4 Why Statistics? See our Privacy Policy and User Agreement for details. If you continue browsing the site, you agree to the use of cookies on this website. : Average support for gun control among women and men. 12.2.1 Test of a single mean, standard deviation known 433 12.2.2 Test of the difference between two means, standard deviations known 435 12.2.3 Tests for proportions, p 436 12.3 T-tests 438 12.3.1 Test of a single mean, standard deviation not known 438 12.3.2 Test of the difference between two means, standard deviation not known 439 The word “statistics” is used in 3 main ways: 1. It is influenced by extreme value 990. View and Download PowerPoint Presentations on Statistical Distributions PPT. 6-2. 1. – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 4c342c-ZjI4N Compare that to the mean dogs' weight. A statistical hypothesis is a conjecture about a population parameter. The mean is useful in determining the overall trend of a data set or providing a rapid snapshot of your data. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Statistical Distributions PPT For example, you shouldn't use the word "average" in a statistical report because people often use that word to refer to different measures. Subtract each score from the mean, then square the difference 3. Geometric mean and harmonic mean are also sometimes used. Trials Measurements. The standard deviation squared. Statistical ppt 1. So, the mean 270 really fails to give a realistic picture of the major part of the data. •Statistics is defined as collection , compilation ,analysis and interpretation of numerical data . It is based on statistical theory which is a branch of applied mathematics. 2. See our Privacy Policy and User Agreement for details. … 10.7. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The Statistical Description of Physical Systems. Now customize the name of a clipboard to store your clips. Statistics is the discipline that concerns the collection, organization, analysis, interpretation and presentation of data. Create PPT slides people will remember - Duarte Inc [CEO]. Fig. Average squared deviation from mean The standard deviation (s) measures spread (or variation) by looking at how far observations are from the mean. •Statistical Sampling 2. The mean … Measure of central tendency is also known as statistical average. So, in that scenario we're going to be looking at, our statistic is our sample mean plus or minus z star. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Other than mean or median, trimmed mean or the Windsorized mean can also be used to represent the central value of a data set. Many businesses rely on statistical analysis and it is becoming more and more important. Inferential Statistical Tests Tests concerned with using selected sample data compared with population data in a variety of ways are called inferen-tial statistical … Statistics is a branch of mathematics which deals with numbers and data analysis.Statistics is the study of the collection, analysis, interpretation, presentation, and organization of data. The midpoint or 50th percentile Position of the median 58 56= N + 1 552 534.5th score 49= 8 + 1= 9 492 2 46 41= 4.5th score Median lies between 53 and 49. 3 What is Statistics ? A Gaussian or normal distribution. Bangalore. 4 Nebraska Hall. STATISTICAL MEASURESMeasures of Center and Variation 2. Make sure the terms of art and statistical terms that you do use in your report are used correctly. Example: The number of nuclear power stations in various countries in 1989. Mean 24.75 s 2.07. The bell-shape is the most popular graphical distribution used in statistics and this template gives three distinctive styles to present it. Statistical significance is important in a variety of fields—any time you need to test whether something is effective, statistical significance plays a role. data points around their mean value. If you continue browsing the site, you agree to the use of cookies on this website. The … PowerPoint Presentation Precision versus accuracy PowerPoint Presentation Interpreting Results of Experiments Introduction to Sampling Overall Methodology: Sampling PowerPoint Presentation PowerPoint Presentation Interpreting quantitative findings Mean Median Mode Optimizing your Site for Users and Revenue, 10 Mobile Marketing Campaigns That Went Viral and Made Millions, The Beginners Guide to Startup PR #startuppr, Understand A/B Testing in 9 use cases & 7 mistakes, No public clipboards found for this slide, VP - Business Development and Training at Juggat Pharma, Jagdale Lifesciences (JLS: sister division of Juggat Pharma) - Jagdale Ind. There are two main bodies of these tests. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Statistical Hypothesis, p-Value, What is ‘Test of Hypothesis’, What is the purpose of Hypothesis Testing? Common meaning: factual information involving numbers. Statistics is the science of dealing with numbers. Min. Based on these well established statistical theorems we can say that means based on large samples (and means based in Normal populations) will have a Normal sampling distribution with an expectation equal to the population mean with a standard deviation equal to the standard deviation of the population divided by the square root of the sample size n. A5. What is statistics? The Statistical Distribution PowerPoint Curves has a collection of 18 diagrams. The various measures of central tendency – mean, VOCABULARY Data with one variable is called univariate. 9.7. Frequency distribution Measures of central tendency Measures of dispersion Statistical significance T-test... 4. To find the third largest number, use the following LARGE function. Most data sets are not part of a down-loadable package Most people need to import their own data sets into R Example – Airport data (download to Desktop) In R: File → Change Dir → Desktop → OK name given < - read.table (“airport.csv”, header = TRUE, sep = “,”, row.names =1 … scores vary from the mean of the distribution To find the standard deviation: 1. A few weeks ago, I ran into an excellent article about data vizualization by Nathan Yau. Clipping is a handy way to collect important slides you want to go back to later. Mean (X) = X N Sd (s) = N X2 - ( X)2 N(N - 1) Variance: The mean of the squared deviations from the mean. Large. Determine Your Alpha. The arithmetic mean, more commonly known as “the average,” is the sum of a list of numbers divided by the number of items on the list. If you continue browsing the site, you agree to the use of cookies on this website. This Statistics preparation material will cover the important concepts of Statistics syllabus. Download Statistics PowerPoint templates (ppt) and Google Slides themes to create awesome presentations. Statistical mean is a certain kind of mathematical average that's very useful in computer science, and in machine learning in particular. 24.75 ±0.93 S.E. For example, the mean marks obtained by students in a test is required to correctly gauge the performance of a student in that test. Free + Easy to edit + Professional + Lots backgrounds. A statistical hypothesis is a conjecture about a population parameter. Statistics is the science and practice of developing human knowledge through the use of empirical data expressed in quantitative form. Looks like you’ve clipped this slide to already. Sum all of the squared difference scores 4. See our User Agreement and Privacy Policy. Before you can begin to understand statistics, you need to understand mean, median, and mode. 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