MAD step 1, steps: 1. find the mean , MAD step 2, find each distance from the mean, MAD step 3, ignore negatives, MAD step 4, Add the distances., MAD step 5, Divide by how many numbers, UQ, middle of the upper half, LQ, middle of the lower half, Range, Biggest number − smallest number, Mode, The number that appears the most, Median, Put numbers in order. find the middle number, Mean, add all numbers together. then divide by how many numbers there are., MAD Outlier Lower, Mean − 2.5(MAD), MAD Outlier Upper, Mean + 2.5(MAD), Lower Outlier, LQ − 1.5(IQR), Upper Outlier, UQ + 1.5(IQR), IQR, UQ − LQ This measures the spread of the middle 50% of data., Range, Max − Min, Box and Whiskers, Need the five-number summary, Five number summary, Minimum, Lower Quartile, Median, Upper Quartile, Maximum, Population, EVERY person/object in the group.per Quartile, Maximum, Sample, only PART of the group., Surveying all students, Population, Surveying 50/100 students, Sample.

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