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Politics : Formerly About Advanced Micro Devices

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J_F_Shepard

To: i-node who wrote (1002394)

2/26/2017 2:19:25 PM

From: koan

1 Recommendation Read Replies (3) of 1573867

God, at last you ask a question. That is a start. Yes, I can explain it to you and glad to do it.

A standard deviation is based on the normal curve, like the one in picture. Now think of IQ's. They have a standard deviation of.16. So the first standard deviaiton above and below the mean of 100 is 84 and 116. This means 68 % of the population has an IQ between those ranges. The first standard deviation is 34%, next is 13%. then 3%, then less than 1%.

So 3 standated deviations only happens once in a hundred times. With regard to sea ice that means each year the chance of being 3 standard deviations based on random events is less than once every 100 years.

When you get them 3 standard deviations year after year that means the chances of it being random is like a zillion to one--exageration, but close-lol.

The 1981, 2010 shows the two standard deviation range. It is below that now.


Look at 2017, it is more than two standard deviations from the mean, as has most of the last ten years. Anyone who understands what a standard deviation is , and what it means to have them stacked back to back for years, should be horrified!

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