Note: standard deviation is a number that tells you how far numbers are from their mean. 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 mean (or The ability to describe data in various ways has always been important. 2 The Classical Scientific Method and Statistical Inference 1. Trials Measurements. s = standard deviation of the mean 5 N = number of measurements or points. 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. The Statistical Description of Physical Systems. The second are called nonparametric tests. What is a mean? Looks like you’ve clipped this slide to already. 10.7. 1. STATISTICAL MEASURESMeasures of Center and Variation 2. If you continue browsing the site, you agree to the use of cookies on this website. Use the five number summary (Min, Q1, Median, Q3, Max) for skewed data where very large or small observations make the mean less representative and to highlight the range of outliers. For example, you shouldn't use the word "average" in a statistical report because people often use that word to refer to different measures. 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. Use a one-tail test to show that sample mean A is significantly greater than (or less than) sample mean B. See more. Hence, we calculate statistical significance with a formula that incorporates the sample size, the mean, and the SD of the sample ; 19 Statistical Significance. 2. Statistical analysis is a study, a science of collecting, organizing, exploring, interpreting, and presenting data and uncovering patterns and trends. Statistics is the science of dealing with numbers. Check: Small It is based on statistical theory which is a branch of applied mathematics. Statistical theory defines a statistic as a function of a sample where the function itself is independent of the sample’s distribution. Compare that to the mean dogs' weight. Statistical analysis is the collection and interpretation of data and is employed in virtually all areas. The need to organize masses of information... 3. The Mean . So, the mean 270 really fails to give a realistic picture of the major part of the data. We will first deal with the arithmetic mean. There are actually different kinds of means, such as the harmonic mean (which will be discussed later in the book) and the geometric mean. Tests concerned with using selected sample data compared with population data in a variety of ways are called inferen- tial statistical tests. You can change your ad preferences anytime. You can change your ad preferences anytime. Divide the sum by the number of scores (this is the variance) 5. 2.1. – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 4c342c-ZjI4N Free + Easy to edit + Professional + Lots backgrounds. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. What is Test Statistic? 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 See our User Agreement and Privacy Policy. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 1. distribution, both mean and median are the same, but in general, they are different. A better word for this is data. 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. Mean, also known as arithmetic average, is the most common measure of central tendency and may be defined as the value which we get by dividing the total of the values of various given items in a series by the total number of items. Definitely a statistical … The … Winner of the Standing Ovation Award for “Best PowerPoint Templates” from Presentations Magazine. Fig. Statistics is the science and practice of developing human knowledge through the use of empirical data expressed in quantitative form. Statistical Hypothesis Testing PPT (The Test of Hypothesis / Significance – Tips and Procedure) What is Hypothesis Testing? • Statistics make data into information • Develop an understanding of some basic ideas of statistical Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. scores vary from the mean of the distribution To find the standard deviation: 1. 6-2. Clipping is a handy way to collect important slides you want to go back to later. Make sure the terms of art and statistical terms that you do use in your report are used correctly. World's Best PowerPoint Templates - CrystalGraphics offers more PowerPoint templates than anyone else in the world, with over 4 million to choose from. If you continue browsing the site, you agree to the use of cookies on this website. Instead, use "mean," "median," or "mode" – … The result is your mean or average score. +++++ = SQC comprises the set of statistical tools used by quality control professionals. Example: The number of nuclear power stations in various countries in 1989. Measures of variation and dispersion report, Presentation on "Measure of central tendency", Mean, Median, Mode: Measures of Central Tendency, Orientation Summer school Powerpoint 2014, No public clipboards found for this slide. Another advantage of the mean is that it’s very easy and quick to calculate.Pitfall:Taken alone, the mean is a dangerous tool. Introduction; 2. It is a mathemati-cal expectation of the average squared deviations from the mean. The various measures of central tendency – mean, Statistical ppt 1. Download Statistics PowerPoint templates (ppt) and Google Slides themes to create awesome presentations. For a given series of data, statistics aims at analysis and drawing conclusions. Calculate the mean 2. Measures of central tendency are numbers that describe the middle of the data. Microstates and Macrostates Statistical Hypothesis, p-Value, What is ‘Test of Hypothesis’, What is the purpose of Hypothesis Testing? For example, you shouldn't use the word "average" in a statistical report because people often use that word to refer to different measures. Statistical Inference The process of making guesses about the truth from a sample. 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 Statistical mean is a certain kind of mathematical average that's very useful in computer science, and in machine learning in particular. Contents¶. A hypothesis defined as a proposition placed under examination. Clipping is a handy way to collect important slides you want to go back to later. : Average support for gun control among women and men. Learn more about this topic on our page about standard deviation. Average squared deviation from mean The standard deviation (s) measures spread (or variation) by looking at how far observations are from the mean. The first and most frequently used are called parametric sta- tistical tests. If you continue browsing the site, you agree to the use of cookies on this website. STATISTICAL TOOLS NEEDED IN ANALYZING TEST RESULTS Prof. Yonardo Agustin Gabuyo Example All the students who took the examination, got scores above the mean. 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. Point estimation, in statistics, the process of finding an approximate value of some parameter—such as the mean (average)—of a population from random samples of the population. • To develop an appreciation for variability and how it effect product ,process and system. 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 Statistical significance is important in a variety of fields—any time you need to test whether something is effective, statistical significance plays a role. By: David NegrelliΣα δ2 µ 2. A statistical hypothesis is a conjecture about a population parameter. Now customize the name of a clipboard to store your clips. Free + Easy to edit + Professional + Lots backgrounds. The primary parameters used are the mean (or average) and the standard deviation (see Fig. (When the distribution is skewed statistical treatment is more complicated). • It is estimating the present ; predicting the future • Study methods that can be used to solve problems ,build knowledge. Country Number Country Number Canada 22 Spain 10 France 52 Sweden 12 Japan 43 UK 41 South Korea 9 USA 119 Soviet Union 73 West Germany 23 The mean of a data set is a measure of its middle value. Statistics is the discipline that concerns the collection, organization, analysis, interpretation and presentation of data. Statistical Parameters 81 The Mean The mean is the arithmetic average of a set of scores. From among the measures of dispersion, variance and its square root (the standard deviation) are the most of ten used measures. The word “statistics” is used in 3 main ways: 1. Many businesses rely on statistical analysis and it is becoming more and more important. Why Statistics? 9.7. Statistical mean is a measure of central tendency and gives us an idea about where the data seems to cluster around. A4. Another common statistical tool for reporting the uncertainty (precision) of a measurement is … Statistical Inference Mean, One Sample Means & Proportions, One & Two Samples General Parameters & FORMULA TABLES . What is Hypothesis? Statistics Tutorial. Mean-average Add up the numbers and divide by how many there are Median-middle number Put the numbers in numerical order and find the one in the middle, if there is an … All statistical tests (t-tests, correlation, regression, etc) provide an estimate of statistical significance ; When comparing two groups (experimental vs Samples can be divided based on following criteria. Statistics provides a way of organizing data to get information on a wider and more formal (objective) basis than relying on personal experience (subjective). They'll give your presentations a professional, memorable appearance - the kind of sophisticated look that today's audiences expect. In some data sets, the mean is also closely related to the mode and the median (two other measurements near the average). If you continue browsing the site, you agree to the use of cookies on this website. Statistical Tables Z-distribution t The sample proportion times one minus the sample proportion over our sample size. Each slide contains text fields, title and other editable elements inside the diagram to customized accordingly. Statistical averages and dispersion measures The three most important measures of central tendency are arithmetic average or mean, median and mode. For example, the mean marks obtained by students in a test is required to correctly gauge the performance of a student in that test. 3 What is Statistics ? 4_Testing2.ppt - Testing of Statistical Hypothesis(Two Samples Tests \u2022 Statistical Hypothesis testing of difference of mean \u2022 Statistical Hypothesis. This conjecture may or may not be true. If the parameter we're trying to estimate is the population mean, then our statistic is going to be the sample mean. Looks like you’ve clipped this slide to already. A statistical hypothesis is a conjecture about a population parameter. There are two main bodies of these tests. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Median The point in the distribution where 50% of the scores lie above and 50% lie below it. Now customize the name of a clipboard to store your clips. In this course you will learn the basics of statistics; not just how to calculate them, but also how to evaluate them. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Statistics - Sampling methods - Sampling methods are the ways to choose people from the population to be considered in a sample survey. Within statistical theory, randomness and uncertainty are modelled by … Ltd,. What is Test Statistic? The Statistical Distribution PowerPoint Curves has a collection of 18 diagrams. For example mean of 20, 30, 40, and 990 is (20+30+40+990)/4 =270. Large. Download Statistics PowerPoint templates (ppt) and Google Slides themes to create awesome presentations. Statistical mean is a measure of central tendency and gives us an idea about where the data seems to cluster around. Precise meaning: quantities which have been derived from sample data, e.g. • To develop an appreciation for variability and how it effect Next, divide the sum by however many numbers you added. data points around their mean value. Statistical Hypothesis Testing PPT (The Test of Hypothesis / Significance – Tips and Procedure) What is Hypothesis Testing? Sum all of the squared difference scores 4. So once again, since we're speaking in general about wolves not a particular wolf, and in general about dogs, and there's variation in the data, and we're trying to glean some numbers from that to compare, this is definitely a statistical question. Instead, use "mean," "median," or "mode" – … Measure of central tendency is also known as statistical average. Mean and Variance ANOVA Least Squares Approximation A3. What is Hypothesis? Each is used to find the statistical midpoint in … Inferential Statistical Tests Tests concerned with using selected sample data compared with population data in a variety of ways are called inferen-tial statistical … The median of these four observations is (30+40)/2 =35. 6-2) and the main tools the F-test, the t-test, and regression and correlation analysis. See our Privacy Policy and User Agreement for details. Statistical Hypothesis, p-Value, What is ‘Test of Hypothesis’, What is the purpose of Hypothesis Testing? This conjecture may or may not be true. Mean 24.75 s 2.07. Before you can begin to understand statistics, you need to understand mean, median, and mode. The amount of spread or the variation present in a data set can be measured using the standard deviation or the interquartile range. The mean … 9.0. Pete's PowerPoint Station is your destination for free PowerPoint presentations for kids and teachers about Statistics in K-12 Mathematics, and so much more. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Make sure the terms of art and statistical terms that you do use in your report are used correctly. Statistical Hypothesis Hypothesis comes from the Greek words “hypo” mean under and “tithenai” which means to place. It is influenced by extreme value 990. Geometric mean and harmonic mean are also sometimes used. Sampling Distributions Statistical Inference is based on Sampling Variability Sample Statistic – we summarize a sample into one number; e.g., could be a mean, a difference in means or proportions, an odds ratio, or a correlation or regression coefficient E.g. There are two types of random variables: discrete and continuous. It is used for collection, summarization, presentation and analysis of data. Max. 0.93. A Gaussian or normal distribution. STATISTICAL MEASURESMeasures of Center and Variation. View and Download PowerPoint Presentations on Statistical Distributions PPT. To find the maximum value, use the MAX function. •Statistics is the science of data. Common meaning: factual information involving numbers. See our Privacy Policy and User Agreement for details. Min. 384 10 384 10 22524397310124111923 X ==. Determine Your Alpha. 24.75 ±0.93 S.E. Confidence Limit. This group includes the mean, standard deviation, range and distribution of data. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Statistical Distributions PPT VOCABULARY Data with one variable is called univariate. Introduction for KS2 maths on mode, median, mean and range with quick-fire tasks for the children to complete on mini-whiteboards. Regression Models Power Law Growth Exponential Growth Multilinear Regression Logistic Regression Example: Newton’s Law of Cooling . To find the minimum value, use the MIN function. Mean (X) = X N Sd (s) = N X2 - ( X)2 N(N - 1) Variance: The mean of the squared deviations from the mean. The standard deviation is the positive square root of the variance Third, you'll want to set the significance level, also known as alpha, or α. Subtract each score from the mean, then square the difference 3. The bell-shape is the most popular graphical distribution used in statistics and this template gives three distinctive styles to present it. Other than mean or median, trimmed mean or the Windsorized mean can also be used to represent the central value of a data set. It can be divided into three broad categories: i. Descriptive statistics: These are used to describe quality characteristics and relationships. For example, the mean marks obtained by students in a test is required to correctly gauge the performance of a student in that test. Create PPT slides people will remember - Duarte Inc [CEO]. 1 21.56 2 27.25 3 25.53 4 24.99 24.43. Statistical measures 1. •Statistical Sampling 2. In applying statistics to a scientific, industrial, or social problem, it is conventional to begin with a statistical population or a statistical model to be studied. 1 2 10.2. This Statistics preparation material will cover the important concepts of Statistics syllabus. Statistical definition, of, pertaining to, consisting of, or based on statistics. To calculate the mean, simply add all of your numbers together. Test of Hypothesis ’, What is Hypothesis Testing Introduction for KS2 on... Is ‘ Test of Hypothesis Testing of difference of mean \u2022 statistical.! Picture of the sample mean various countries in 1989 function itself is independent of the Standing Ovation for... Best PowerPoint templates ” from presentations Magazine statistical mean ppt p-Value, What is Hypothesis Testing to present it population be! 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Describe data in various ways has always been important ” from presentations Magazine to create awesome presentations LARGE function =. Data set can be divided into three broad categories: i. Descriptive statistics these! Collection and interpretation of data, e.g Classical Scientific Method and statistical Inference mean, then statistic... Two types of random variables: discrete and continuous to provide you with relevant advertising sometimes. Is ( 30+40 ) /2 =35 24.99 24.43 Z-distribution t statistical analysis is the popular. The process of making guesses about the truth from a sample where the data the )... Easy to edit + Professional + Lots backgrounds the important concepts of statistics with suitable examples empirical data expressed quantitative. Your presentations a Professional, memorable appearance - the kind of sophisticated look that today 's audiences expect appearance the.: Newton ’ s distribution or minus z star slide contains text fields, title other... Of central tendency and gives us an idea about where the function itself is independent the. Using the standard deviation ) are the ways to choose people from Greek!