[Skywise]

For the record, my dates and times were determined using the random number function from the spreadsheet in Apache Open Office.

Duffy, the point of random trials in any statistical analysis is to see if randomly chosen data gives statistically similar results to the test data. You have a set of a data that seems to correlate to earthquakes. So Roger and I chose random data for you to test. The random data gave similar results. The implication is that your method does no better than random data, therefore is not statistically significant.

But as Roger astutely pointed out, the total data is quite small and this leads to a larger margin of error.

There's a saying, "There's lies, damned lies, and statistics." Statistical analysis can be a very tricky thing and many a scientist has been tripped up by subtle mistakes. Roger understands this and this is why he is so critical in his efforts to understand exactly what you are doing and to make sure his software is working right.

Brian