PPT-9.5 MEAN ABSOLUTE DEVIATION

. DESCRIPTION The formula for the standard deviation is EQ 221 while the formula for the weighted standard deviation is EQ 222 where w is the weight for the ith observation N is the number of nonzero weights and is the weighted mean of the observation 1-7. Mean Absolute Deviation Practice. 1. Daily Visitors to a Web Site: . The MAD is 18.48 indicating the average difference of visits to a web site from the mean is 18.48 times. The data is spread out in relation to the mean. . First center (expected value). Now - spread. 4.2 (cont.) Standard Deviation of a Discrete Random Variable. Measures how “spread out” the random variable is. Summarizing data and probability. Data. Objectives. Review vocabulary. Variance. Normal distributions. Applications of statistics. Mean absolute deviation. Mean Absolute Deviation is a measure of the . dispersion. of data (how . spread out . 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 . 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.. The student will summarize, represent, and interpret data on a single count or measurement variable.. 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.. 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.. Obj. : The student will be able to . . 1) Calculate standard deviation. . 2) Calculate mean deviation. HWK: Worksheet. Vocab: 1) standard deviation – a measure of how spread out the numbers are. Mean Absolute Deviation (MAD). The average distance each data point is away from the mean of the data.. Example: . Find the MAD of the following data set: . . 12, 16, 7, 13. Measures of Center. The two measures of center are . 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 Lesson Topic: The Mean Absolute Deviation (MAD) Lesson Objective: I can… I can calculate the mean absolute deviation (MAD) for a given data set. I can interpret the MAD as the average distances of data values from the mean. FELE 6 Number of items 6 Average Absolute Deviation from Median 117 EDU 621 Human Resources Number of items 6 Average Absolute Deviation from Median 167 EDU 622 Cultural Diversity Number of item 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..