The data points on a graph for some of my struggling readers can look like a patient having a heart attack with the Aimsweb trending line averaging the data.
You basically have four
data points on that graph: four decadal rings.
Starting with two closely spaced
data points on the graph below, lay a straight - edge between them and notice how for a short period of time you cancreate almost any slope you prefer, simply by being selective about what data points you use.
Not exact matches
Can you record the time taken for the slime to flow between the two
points on the viscosity board and plot the
data on a
graph?
Plotting a
graph with suitable combinations of these variables
on the two axes, the researchers traced a straight line that coincided almost perfectly with the experimental
data points.
To help students grasp that each
point represents two values, group members suggested giving students more experience collecting
data and plotting it
on coordinate
graphs using different scales.
The baseline should be recorded
on the Progress Monitoring
Data Points graphs.
The first
graph below, in which each
data point relates the average socioeconomic index score for a decile of a particular OECD country's students to that decile's average performance
on PISA's math test, depicts this relationship.
Data points that fall in the upper left portion of the
graph represent powerful rallies
on contracting volume.
That's evident from the
graphs I
pointed you to, which not only calculate trends, but also present the
data on which the trends are based.
In amongst the multimedia examples in the column was one from Teddy TV titled «Trend and variation» — purporting to teach the viewer the difference between trend («an average or general tendency of a series of
data points to move in a certain direction over time, represented by a line or curve
on a
graph») and variation («common cause variation is also known as «noise» or «natural patterns,»» the squiggles
on a
graph).
For those unsure
on that
point, here is the
graph with the
data misplaced
on the x-axis as noted by Foster @ 27:
The last
data -
point will be shown 2.5 - years before the last
point on the
graph.
Even when the calculation is extended to cover nominally the whole period as is done in your
graphs, the latest
data point has a weight of 0.67 in the filtered values presented, i.e. less than any of the interior values but more than 0.52, which it would have
on the values up to 2010, if 2010 would be a normal interior
point.
If I go out and measure something, anything, and plot the
points of a piece of
graph paper, and the
points may lie
on a straight line, some sort of curve, or there may be so much noise in the
data that no trend is apparent, then this is what fits the
data.
They don't start from 1997, the first hadcrut4
data point they plot
on the
graph is September 1997.
When we add the next 10 year averaged
point on the
graph, for the year 2012, we will use
data from the year 2003 to 2012 inclusive.
I merely wanted to
point to the basic
data available
on the Met office site (an organisation I visit frequently in order to use their archives) and ask those saying Rose was wrong to explain why, in simple terms, when the Met office
graphs seemed to show he was basically correct.
No snark here, but which
graph would you cite that has a degree of authority, i.e one not manufactured
on wood for trees using dubious end
points and
data.
Derivatives are indicated
on the
graphs by the elements such as «- diff1» meaning the
point differential taken over one
data interval (typically one month).
From this starting
point, and the
data in the
graphs above
on this page that assume a pre-1800 CO2 level of 280 ppmv, we should be able to determine how many ppmv's of CO2 were emitted by man at any particular year in question, right?
The agt has dropped since 2010 with the average through August, 2011 shown as the most recent
data point on the page 5
graph in the pdf made public 9/24/11 (September is looking lower).
I've also shown
on the
graph the well - established age of the Younger Dryas — note that the Shakun et al. global temperature
data points show a dip in temperature (presumably the Younger Dryas) that is considerably younger.
A hint for you Nick, the number of statistically significant
points on my
graph reflects the temperature
data.
dhogaza: Tamino outed himself as Grant Foster at RC when as «guest poster (sic)»
on 16 September 2007 he proceeded to plagiarise (if he was not one of the authors) the paper by GF, Annan, Schmidt and Mann which had been submitted to JGR
on the 10th; the paper attacked Stephen Schwartz» paper in JGR before that had even appeared; Tamino's
graphs required direct access to the
data in GF et al, and it would certainly be very odd for Gavin Schmidt to commission the guest posting if not from his co-author, who at one
point uses the term «we» confirming that «Tamino» was the lead author.
sod I'm not sure if this is just bored graffiti
on your part, but
on the off chance that you genuinely are asking if putting a linear trend through the dataset is better than just comparing the start and end
points then what this thread is telling you is that this
graph /
data doesn't have a linear trend in it, so it probably is.
* You might notice that the intervals between
points in these
data sets are smaller than
on other stubs and
graphs.