PPT-9.5 MEAN ABSOLUTE DEVIATION

. Let’s start with an example. I divided the class into 2 teams, A and B. Coincidentally, the quiz average for team A is the same as team B, 81.5. So we expect a graph of their scores to be about the same, right?. Let’s start with an example. I divided the class into 2 teams, A and B. Coincidentally, the quiz average for team A is the same as team B, 81.5. So we expect a graph of their scores to be about the same, right?. Standard Deviation. . summarizes . the amount . each value . deviates. from . the mean. . . SD. . tells us how . spread out . the data items are in our data set.. If data . is close together, . standard will . Analyzing Statistics In the News. Looking at Statistics In the News. Objectives. Students will be able to calculate the standard deviation of a set of data.. Students will be able to explain the reliability of a set of data using measures such as margin of error and standard deviation.. Objectives:. To calculate and interpret the standard deviation of a data set. To compare the standard deviation of data sets. Warm-up: Complete Problem 1, Questions 1 – 5, on pages 490 – 491.. Use. Standard Deviation and a Bell Shaped Curve. Bozeman Biology Video on Standard Deviation. Standard deviation measures the spread or the variation in the data. 68% of the individuals are within 1 standard deviation . Standard Deviation. &. The Bell Curve. Standard Deviation. 1st find the . variance. for a set of data. Variance is the average squared deviation from the mean of a set of data. Computing the Variance . Kevin McLeod & Chris Horton. OCE, Region 12 Houston. 1. Introduction. Brief discussion of history and scope. Review of compliance documents. Investigation process. 2. Clean Air Act. 1977 Clean Air Act. Annette Maxwell and Erica Solis. Office of Compliance and Enforcement . May 5, 2015. Brief discussion of history and scope. Review of compliance documents. Investigation process. Introduction. 1977 Clean Air Act. Analyze the spread of data.. 4. 3. 2. 1. 0. In addition to level 3.0 and above and beyond what was taught in class,  the student may:. · Make connection with other concepts in math. · Make connection with other content areas.. Since the averages are the same, can we assume that the students in both classes all did pretty much the same on the exam?. The answer is… No.. The average (mean) does not tell us anything about the distribution or variation in the grades.. Bell Work Construct a box and whisker plot for the data below that represents the goals in a soccer game. (USE APPROPRIATE SCALE) 7 , 0 , 2, 5, 4, 9 , 5, 0 Calculate the mean, mode, IQR and range Identify the symbols for mean, sum, variance and standard deviation Objective of measures of dispersion . 1) To judge the reliability of measures of central tendency.. 2)To make a comparative study of the variability of two series.. 3) To identify the causes of variability with a view to control.. Find the standard deviation and variance of a set of values. . Apply standard deviation and variance. . Vocabulary. Standard deviation: A measure of how far the numbers in a data set deviate from the mean. Represented by the Greek letter Sigma .