A plant fertilizer manufacturer wants to develop a formula of fertilizer that yields the most increase in the height of plants. To test fertilizer formulas, a scientist prepares three groups of 50 identical seedlings: a control group with no fertilizer, a group with the manufacturer's fertilizer, named GrowFast, and a group with fertilizer named SuperPlant from a competing manufacturer. After the plants are in a controlled greenhouse environment for three months, the scientist measures the plants' heights.
You can use this data to demonstrate Boxplot, Interval Plot, and other analyses that compare distributions.
|Worksheet column||Description||Variable type|
|Fertilizer||The fertilizer used: None, GrowFast (the test fertilizer), or SuperPlant (the competitor's fertilizer)||Factor|
|Height||The height of the plant||Response|