# Re: confidence interval

Date: Wed, 13 Sep 2006 11:21:36 -0700

Hi Dennis,

when I print out the regline variable rc I don'nt get rstd as attribute of
rc variable. Following is the output when I print rc..

Variable: rc
Type: float
Total Size: 4 bytes
1 values
Number of Dimensions: 1
Dimensions and sizes: [1]
Coordinates:
Number Of Attributes: 6
_FillValue : -999.99
yintercept : 8.120622
yave : 3.707732
xave : 4.140838
nptxy : 789
tval : -4.62858
(0) -1.0657

Thanking you,
Nilesh

Quoting Dennis Shea <shea_at_ucar.edu>:

> That was a typo. Now fixed.
>
> rc_at_tstd ==> rc_at_rstd
>
>
> On Tue, 12 Sep 2006, araligin_at_onid.orst.edu wrote:
>
> > Hi Dennis,
> >
> > Note 3: To construct 95% confidence limits for the regression coefficient:
> > [a] The t for 0.975 and 16 degrees of freedom is 2.120 [table
> > look-up].
> > [b] rc_at_tstd * 2.12 = 0.053. This yields 95% confidence limits
> of
> > (0.97-0.053) < 0.97 < (0.97+0.053) or (0.92 to 1.03).
> >
> >
> > I went through the example but was confused on what "tstd" is (rc_at_tstd )
> >
> > Thanking you,
> > Nilesh
> >
> >
> >
> >
> > Quoting Dennis Shea <shea_at_cgd.ucar.edu>:
> >
> >>>
> >>> I want to compute the 95% confidence interval using t-statistics for a
> >>> regression line. Is it possible to do it in NCL.
> >>>
> >> _______________________________________________
> >> Dpes not regline
> >>
> >> http://www.ncl.ucar.edu/Document/Functions/Built-in/regline.shtml
> >>
> >> return the t-statistic, the number of pts used
> >>
> >> See the example
> >>
> >>
> >>
> >
> >
> > _______________________________________________
> > ncl-talk mailing list
> > ncl-talk_at_ucar.edu
> > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> >
>
>

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Received on Wed Sep 13 2006 - 12:21:36 MDT

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