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Measures of Center. MAFS.7.SP.2.3 Informally assess the degree of visual overlap of two numerical data distributions with similar variabilities, measuring the difference between the centers by expressing it as a multiple of a measure of variability.
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Measures of Center MAFS.7.SP.2.3 Informally assess the degree of visual overlap of two numerical data distributions with similar variabilities, measuring the difference between the centers by expressing it as a multiple of a measure of variability.
Do 5th graders and 7th graders spend the same amount of time studying math? • In this lesson you will learn to compare two data sets by looking at their means and mean absolute deviations. http://www.google.com/imgres?imgurl=http%3A%2F%2Fbestclipartblog.com%2Fclipart-pics%2F-math-clipart-3.gif&imgrefurl=http%3A%2F%2Fbestclipartblog.com%2F22-math-clip-art.html%2Fmath-clipart-3&h=362&w=303&tbnid=TKgA6t-bAaqTcM%3A&zoom=1&docid=0NriKZKIw9BiqM&ei=N5OpU7KZB9HQsQTgnIDYCA&tbm=isch&ved=0CFEQMygVMBU&iact=rc&uact=3&dur=4101&page=2&start=8&ndsp=17
Mean – the sum of a set of numbers divided by the number of elements in the set. Also known as average. https://www.google.com/search?q=mean+median+mode+clip+art&rlz=1C1FLDB_enUS514&espv=2&biw=994&bih=611&tbm=isch&imgil=Nr11A8HHfg39dM%253A%253Bhttps%253A%252F%252Fencrypted-tbn1.gstatic.com%252Fimages%253Fq%253Dtbn%253AANd9GcTKv2IPwbIZGTzWpNcq3_01yh4n2QbDFtKB77bmRVLr5p1B_4Sbvw%253B596%253B413%253Bcb7wjLs050jcTM%253Bhttp%25253A%25252F%25252Fserchomeschool.wordpress.com%25252F2014%25252F01%25252F02%25252Fmean-median-and-mode-science-and-math-in-action-pre-class-materials-class-3%25252F&source=iu&usg=__wj6cesAm8nHquDRb2AoBrk-iT-4%3D&sa=X&ei=rpOpU429N8LJsQSlq4LwBQ&ved=0CB8Q9QEwAA
Mean Absolute Deviation • The average distance between each data point and the mean. http://www.toondoo.com//public/s/p/a/sparks783/toons/cool-cartoon-7697563.png
Mean 480 10 = 48 minutes Mean Absolute Deviation 204 10 = 20.4 minutes 20.4 minutes is the average distance away from the mean.
Mean 1290 10 = 129 minutes Mean Absolute Deviation 288 10 = 28.8 minutes
MAD – what does it mean? The higher the MAD, the greater variability there is in the data (variability is how spread out or how clustered a group of data is). High variability means the data is really spread out. Low variability means the data is really close together. How does this apply to our data?