Organize and display a numerical data set using a dot plot and a histogram, choosing appropriate intervals.
A dot plot shows every data value as a dot above a number line - it is great for smaller sets of data because you can see each individual value.
A histogram groups data into equal-width intervals, called bins, and draws a bar for each interval showing how many values fall inside it. Histograms work well for larger data sets where individual dots would be too crowded.
Choosing good intervals matters: too few bins hides patterns, and too many bins scatters the data with no clear pattern. Equal-width bins that cover the whole range work best.
Mastery looks like: They correctly build a dot plot or histogram from a data set with reasonable bins and can explain what the display reveals.
Common stumbles: Confusing the height of a bar or stack, which is a count, with the data value itself; choosing bins that are too narrow or too wide to show a clear pattern.