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Created with Fabric.js 1.4.5 Data Handling Mean, mode, median, range Mean (Average)The mean is the total of the numbers divided by how many numbers there are.ModeThe mode is the value that appears the most.MedianThe median is the middle value.RangeThe range is the difference between the biggest and the smallest number. Stem & Leaf Skewness SYMMETRIC DATA RIGHT-SKEWED DATA LEFT-SKEWED DATA 4 | 7 4 | 58 4 | 0 5 | 35 5 | 011245569 5 | 5 6 | 005 6 | 2445 6 | 2 7 | 11200 7 | 17 7 | 8 | 846799 8 | 8 | 17 9 | 0199 9 | 2 9 | 2445 10 | 41 10 | 5 10 | 011245569 11 | 1 11 | 0 11 | 58 Mean of 3,4,5,6,7,8,9,10,10=3+4+5+6+7+8+9+10+10------------------------ = 7.75 8 Mode of 3,4,5,6,7,8,9,10,10 = 10 Median of 3,4,5,6,7,8,9,10,10 = 7 Range of 3,4,5,6,7,8,9,10,10 = 7 = 10 - 3 Cumulative Frequency Interquartile rangedifference between the lower and upper quartile. Cumulative frequency graphs are always plotted using the highest value in each group of data, (because the table gives you the total that are less than the upper boundary) and the cumulative frequency is always plotted up a graph, as frequency is plotted upwards. Classesthe groups the data is organised into.Class boundaries boundaries between one class and the next. Class width the difference between the upper class boundary and lower class boundary.Midpoint of the classthe middle of the upper and lower class boundaries (i.e, the median). Types of Graphs Line Graph Bar Chart Pictograph Pie Chart Scatter Plots Histogram
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