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I can identify the shape of a data distribution using statistics or charts. I can make inferences about the population from the shape of a sample. You have 4 minutes to roll a pair of dice as many times as possible. Make sure to keep track of the sums that you roll! Mean: the average of a set of data Add all of the values up and divide by the total number Standard Deviation: A measure of variation from the mean Remember, is the mean. Spread of a data set: The “width” of a data set Range Quartiles Interquartile Range Graphing data on a Histogram • The Independent Variable (what you are changing) goes on the x-axis • The Dependent Variable (the result of your experiment) goes on the y-axis Use One your personal data to create a graph at a time, come to the computer and enter your data into the spreadsheet 9 8 7 6 5 4 3 2 1 0 2 3 4 5 6 7 8 9 10 11 12 What does it look like? Why is it called a bell curve? What does “normal” mean? What makes a set of data “normal”? 7 6 5 4 3 2 1 0 2 3 4 5 6 7 8 9 10 11 12 What does it look like? Why is it called a bell curve? What does “normal” mean? What makes a set of data “normal”? Is your data normally distributed? Mean = 490 Standard Deviation = 100 Is the data normally distributed? Does the sample size have an effect on the normality of the data? I can identify the shape of a data distribution using statistics or charts. I can make inferences about the population from the shape of a sample. Value on the Dice Probabilit y 2 1/36 3 2/36 4 3/36 5 4/36 6 5/36 7 6/36 8 5/36 9 4/36 10 3/36 11 2/36 12 1/36