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## Analysing performance data (somewhat OT stat question; sorry)

**From**: |
James Knowles |

**Subject**: |
Analysing performance data (somewhat OT stat question; sorry) |

**Date**: |
Wed, 22 Sep 2004 11:54:11 -0600 |

**User-agent**: |
Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.7) Gecko/20040616 |

`I've been collecting performance data for different software
``configurations, and examining it in Octave.
`

`It's been about 15 year since college stats class, so I'm rusty. Some
``data distributions are normal, and a simple t-test works great for
``testing whether there's a significant difference between configurations.
``Many are visually "obvious," but some are not. They all need to be
``documented, however.
`

`Some are heavily skewed, scrunched up near zero. I don't remember what
``this kind of distribution is called. I do not remember what to use here
``to test a null-hypothesis of the two data populations being the same.
``(Yes, inaccurate terminology; sorry.)
`
Octave has alot built in, and I don't want to just plug data in randomly.
Thanks!
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**Analysing performance data (somewhat OT stat question; sorry)**,
*James Knowles* **<=**