## 4.2 Using the calculator statistics mode

Bamboo is a fast-growing, strong grass useful for green building practices. A small research study explored the properties of bamboo when used as flooring material, including the bending strength (the Modulus of Rupture, or MOR, in MPa).

Five different bamboo floorboards were provided by Bamboo Flooring Australia Pty Ltd and assessed by the Queensland Department of Primary Industries (Gerber 2004).

The five MOR test results (in MPa) are:

 99.2     111.2     97.6     101.1     104.0
If you are using your calculator correctly, you should get $$\bar{x}=102.62$$ and $$s=5.356$$. If you get $$s=4.790157$$ for the standard deviation, you are using your calculator incorrectly, so please ask for help.