Probability and Statistics Cookbook by Matthias Vallentin

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The cookbook contains a succinct representation of various topics in probability theory and statistics. It provides a comprehensive reference reduced to the mathematical essence, rather than aiming for elaborate explanations.

http://matthias.vallentin.net/probability-and-statistics-cookbook/

Hack your way to change iPhone 4s ringtones (tones)

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Kudos goes to: NicholasCross via MacWorld

1. Launch iTunes 10

2. Find and select the song you want to make a ringtone out of in iTunes 10

3. Right-click on the song name and select ‘Get Info’, then click on the Options tab

4. Select the playback period of the song that you want to ringtone to be, make sure it’s 30 seconds

5. Now click “OK” and then right click on the song again, and select “Create AAC version” to create a new version of the song with the 30 second interval you specified

6. Locate this newly created 30 second clip in iTunes (at the top of the playlist if you search by ‘date added’ and right click on the file and then select “Show in Finder”

7. Now in the Finder (or Windows explorer, the process is the same for Windows iTunes 10), rename the file extension from .m4a to .m4r

8. Accept the file extension change to .m4r

9. Now back in iTunes remove the file from the playlist (do NOT move to Trash, select ‘keep file’) and then re-import the file into iTunes 10 by double clicking the .m4r file within the Finder or Windows

10. The file will now be added back into iTunes as a ringtone and you can do what you want with it

The best part about this is that you can do multiple sounds at once. Especially if you use Automator to rename the file extensions of the files in question. I tried this method and found it MUCH faster, and easier. No GarageBand required.