When Only 80% Of Computers Having Viruses Is Considered A Good Thing
from the ouch dept
The headline of this story sounded like good news at first, claiming: Fewer computers infected with virus. Then you read the details, and realize they're saying that the number of virus infected computers in China has dropped from 88% to just 80% -- and you have to wonder just what folks are doing there to have so many viruses. Given China's ability to control so much of the internet in that country, you would think that part of those efforts would go towards trying to block viruses. Apparently not.
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Um Sony?
What percentage of the US is infected? Or Europe? Are you?
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Re: Um Sony?
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Confidence Interval?
To determine probability, our intuition may tell us to flip 100 times and count the number of heads, i.e. use the sample proportion. However, it can be shown mathematically that it is better to artificially add 3 heads and 3 tails to our counts, if we are confident that the true probability is close to 50%. Our estimate will be about 11% more accurate this way.
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Re: Confidence Interval?
And the 95% CI is a typical cutoff for estimating unusual values.
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Re: Confidence Interval?
The probability of not making a Type II error, i.e. correctly finding significance, is known as "power".
95% CI has been the gold standard for much of scientific research for many years. It's saying that if we were to repeat the experiment at the same scale, we have a 95% chance of reaching the same conclusion. Here, the 95% is known as the "size" of the test. One can perform 90% CI in situations where the results are inexact, or 99% CI's in situations that demand more precision.
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Re: Confidence Interval?
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Preventing viruses requires education
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hen Only 80% Of Computers Having Viruses Is Consid
This way the Chinese are so damn busy cleaning their computers of viruses there isn't any time to fight the government.
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