Notes: 

• This applet should work in IE but may be slow.
• Use the green squares on the movable line to change slope, intercept. 
• Right now pasted data must have variable names (use single words, no symbols)
• Dotplot coloring may not exactly match count, as coloring is based on bin mid-points
• To model random sampling, use Design Population to describe a population and then press Create Population. Initial settings match sample data (if you change slope, consider the desired intercept as well.)
• For the Spanish version, click here