Re: Point of Intersection - Straight line and Curve
- From: "ms" <silvertonm@xxxxxxxxx>
- Date: 24 Jan 2007 13:00:23 -0800
Right now, I have been observing the limb growth in mm (males). Of my
3 observations(I know that is a small number), I performed simple
linear regression to get my predicted line. The other group will be
females. I could smooth the collected data, but was wondering if there
was a way to do this with just two sets of data points. Just trying
some different ideas that I thought sounded interesting. Thank you for
your comments.
On Jan 23, 4:17 pm, "Nick" <tulse04-ne...@xxxxxxxxxxx> wrote:
Do you really mean the data is arbitrary - or do you mean that it is
hypothetical at the moment - not quite the same thing. You were the one who
said that they were "real data points" which is quite the opposite of
arbitrary ie implying that these were results that you had obtained from
measurement.
Many measurements in real life eg from an experiment will tend to be jagged
eg plotting X against Y. Regression smooths the curve. Whether you consider
it is a straight line or a curve will be determined by regression analysis.
But any plot of such data will tend to be jagged. The jaggedness that you
speak of will be "explained" by random variations about the line such as
caused by experimental error and other factors.
What are you measuring - either theoretically or when you get the actual
data what will it be measuring?
Statistics is a practical science and what you are measuring or intending to
measure might have some bearing on one's response.
I am interested in how you have obtained the predicted line.
Nick
"ms" <silvert...@xxxxxxxxx> wrote in messagenews:1169561233.678614.290550@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
At this point the data is arbitrary, but I will be looking at growth
rates. One is a predicted (linear) and the other will be actual data
which is more of a curve. Thanks for the help.
Nick wrote:
"ms" <silvert...@xxxxxxxxx> wrote in message
news:1169542453.970608.279900@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have real data points in which one of them forms a straight line and
the other is a curve(not a simple curve, but more jagged). When I
graph the two, I notice there is a point of intersection between the
straight line and the curve. This point of intersection is not one of
the "data" points that I have plotted. Is there a way to determine the
point of intersection of the line and the curve? Any help would be
appreciated!
What sort of data are we talking about?
Nick- Hide quoted text -- Show quoted text -
.
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