They realized Astra having the same score as Sol was silly so they rushed to update the index so it fits what people expect. The old index was clearly bad (Astra is way better than Sol) but it's also unscientific to tweak it like this.
is any of this 'scientific'? does AA allow peer review of its processes? are these published in journals of at least medium impact? what are the sample sizes? how grounded is their mechanistic reasoning? like they have words that are dressed in scientific language on their site like "We estimate a 95% confidence interval for Artificial Analysis Intelligence Index of less than ±1% - based on experiments with >10 repea…
It's just high school statistics: https://en.wikipedia.org/wiki/Confidence_interval
It's not a probability. It's essentially an assertion that if the test were run 100 times, the result would be within the interval 95 times.