Dealing With a Lot of Numbers…. Chapter 4: Displaying and Summarizing Quantitative Data. Summarizing the data will help us when we look at large sets of quantitative data. Without summaries of the data, it’s hard to grasp what the data tell us. The best thing to do is to make a picture…
Chapter 4: Displaying and Summarizing Quantitative Data
frequency histograms are faithful to the area principle.
Range = max – min
IQR = upper quartile – lower quartile
The formula says that to find the mean, we add up all the values of the variable and divide by the number of data values, n.