Level 2: Informally describe the contribution of one or more sources of variability to variability observed in the system.
2B
Describe how a process or a change in process affects variability.
"When we used the ruler, there were more mistakes (more gaps and laps), but when we switched to the tape measure, there were fewer mistakes. So, the measurements with the ruler are more spread out than the measurements with the tape measure."
"If we all carefully measure the height of the flagpole, we will all be pretty close to its real height; so our measurements will look like a hill."
"When we first plant and measure each plant's height, the height can't be less than 0. So the plants' heights on day 3 will be skewed to the left."