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The Almighty
thank you.
I really don't think it's our job to educate someone on math, statistics, and trend analysis. We're wasting our time.
and what is the average change in those temperatures gumby....
thank you.
I really don't think it's our job to educate someone on math, statistics, and trend analysis. We're wasting our time.
Sorry, the average CHANGE .....
+12, 0, +2, +1, -3, -2, -1, -7, -2
Add them up... the average change is what? zero.
The average change is not indicative of the trend. The mean temperature is more indicative.
and what is the average change in those temperatures gumby....
NASA: "The eight warmest years in the GISS record have all occurred since 1998, and the 14 warmest years in the record have all occurred since 1990."
The average change is not indicative of the trend. The mean temperature is more indicative.
Careful. He might call you "Gumby" and charge that you're "chanting consensus" if you try to explain things to him rationally, and with the facts on your side.
In my example it shows that there is a spike at the beginning and end of the sample and therefore the sample beginning and ending is not indicative of the overall trend. However the average as compared to each of the temperatures will give you a trend, taking a "mean" differential rather than an average.Actually, that is incorrect. A trendline is linear. The average change is what gives you a trendline.
The moving average is going to give you the pattern of the individual data sets and there relation to the overall trendline. It is not linear. It shows the relation to the trend that will give you indicators as to whether you should expect future increases of decreases. (in your example, it would show that the average temperature was above the trendline over those ten years.)
Look at tinfoils graph above.... the line connecting the triangles is going to give you your moving average. But the trend line is going to be drawn from peak to peak or from trough to trough.
If we were to look back at the past twenty years, it would show a different trendline (which would show an increase and warming).
Scientists don't use "averages". Maybe armchair supertools on message boards ascribe some meaning to "averages" between two random data points. And maybe clueless amatuers "draw a straight line" through two random end data points to define a "trend". Experts don't.
They use mean annual and five year means in trend analysis. Don't tell me I have to explain the difference to you.
In my example it shows that there is a spike at the beginning and end of the sample and therefore the sample beginning and ending is not indicative of the overall trend.
In your example the trendline does not adequately describe what the average temperatures did over that time. Which is why trendlines are not used by themselves. Because they will not tell the entire story. But trendlines are always linear and they have to go through the start point and end point.
No climatologist worth anything would look at 1998 & 2007, draw a linear line, conclude the "trend" based on that & ignore all of the years in between, or the years prior.
PLEASE STOP WASTING OUR TIME, energizer bunny blockhead hack....
SF says ^^^^
So Onceler answers:
lol.
SF even says that it isn't just the trend line that people would use. Onceler loves to argue in agreement.
ROFLMAO....
So according to Gumby... scientists don't use averages.... they use means.
You should seriously hang your head in shame for that one Gumby.
and yes.... a trendline is always linear.... a straight line between two data points.
SF says ^^^^
So Onceler answers:
lol.
SF even says that it isn't just the trend line that people would use. Onceler loves to argue in agreement.
For weeks, including on this thread, he has asked some variation of the question "Please tell me how the planet is warming if there has been no change between 1998 and 2007"? (obviously, only factoring in those 2 years).
Let's see if you're able to do this: knowing what you know about this area of science, would say that's a smart conclusion, or a "not very informed" conclusion (being kind here), that he is implying.
First, SF has yet to admit he was wrong that 1998 was the hottest year on record. He was wrong. It was 2005.
Second, only a complete amateur hack, and member of the flat earth society, would conciously pick two data points - 1998 and 2007 - and "draw a straight line through them" to define a valid trend.
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The point, which you cannot wrap your tiny little mind around is that I never said there weren't changes in between. Just that the average temperature was the same in 1998 as it was in 2007. Which means that the temperatures on average are the same as they were a decade ago. Which means that the average change in temperature over that ten year time frame is ZERO.
It doesn't mean that the past ten years were not warmer than the previous ten years. They were.
But it SHOULD make you question, WHAT changed? If anything. We were seeing drastic increases in the 1990's.... why did that stop?
Are you not the least bit curious?