Displaying 20 results from an estimated 200000 matches similar to: "chi-square distribution table"
2017 Dec 18
0
chi-square distribution table
Please could you tell me how to make code to outpot chi-square
distribution table?
Please help
2017 Dec 18
2
chi-square distribution table
Please could you tell me how to make code to make chi-square
distribution table?
Please help
2008 Sep 08
0
Poisson Distribution - Chi Square Test for Goodness of Fit
Dear R-help,
Chi Square Test for Goodness of Fit
Problem Faced :
I have got a discrete data
as given below (R script)
No_of_Frauds <-c 1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,2,1,2,2,2,1,1,2,1,1,1,1,4,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,5,1,2,1,1,1,1,1,1,1,3,2,1,1,1,2,1,1,2,1,1,1,1,1,2,1,3,1,2,1,2,14,2,1,1,38,3,3,2,44,1,4,1,4,1,2,2,1,3)
I am trying to fit
2008 Aug 29
0
Poisson Distribution - problem with Chi Square Goodness of Fit test
Chi Square Test for Goodness of Fit
I have got a discrete data
as given below (R script)
No_of_Frauds<-c(1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,2,1,2,2,2,1,1,2,1,1,1,1,4,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,5,1,2,1,1,1,1,1,1,1,3,2,1,1,1,2,1,1,2,1,1,1,1,1,2,1,3,1,2,1,2,14,2,1,1,38,3,3,2,44,1,4,1,4,1,2,2,1,3)
I am trying to fit Poisson
distribution to this data using R.
2006 Jan 24
0
Relating Spectral Density to Chi-Square distribution
Dear list,
I had some confusion regarding what function too use in order too relate
results from spec.pgram() too a chi-square distribution. The documentation
indicates that the PSD estimate can be approximated by a chi-square
distribution with 2 degrees of freedom, but I am having trouble figuring out
how to do it in R, and figuring out what specifically that statement in the
documentation
2008 Oct 25
2
how to plot chi-square distribution in the graph
if i want to plot the chi-square distribution with a different degree of
freedom how can i plot it in the graph?Sometimes i plot the histogram and
cut it in a lot of piece.It's distribution like a chi-square.So i want to
plot the chi-square with a different degree of freedom to compare it .
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2004 Dec 17
2
Doubts about chi-square distribution
Dear list,
For educational purposes I have been working with the script below.
I have a observation:
line 31
#CScal[i] = (amo^2) # IT IS WRONG, I KNOW, BUT IT MAKE R TO CRASHES!
I'm thinking this is a possible bug in the R!
And I have a couple of doubts:
1) line 51
#curve(dchisq(x, n-1), add = T, col = 'red'
I think that it is correct, but the function no
2007 Oct 06
2
plot the chi-square distribution for n=1 through 10, on one plot
Dear help list.
I would like to plot the chi-square distribution for n=1 through 10, on
one plot.
How do I go about doing that?
I know how to plot one chi-square (using curve() for example), but
plotting 10 on one plot, that is too difficult for me.
I greatly appreciate your help.
--
fb
isabellesup at fastmail.fm
--
2007 Jun 26
0
Scale-Inverse Chi square Distribution
Dear all,
sorry to bother you but I was looking for the "scale Inverse Chi square distribution" and I could not find it!
If I remember well , when X~Scale-Inv-Chi-Square (a,b) then X~Inv-Gamma(a/2,a*b/2) but with the shape, scale and rate parameters I always get confused!
Any suggestions?
Thanks a lot for your prompt reply.
Best regards,
Giorgio Di Gessa
2008 Aug 29
0
Please ignore earlier mail - [ Poisson - Chi Square test for Goodness of Fit]
Dear R-help,
?
?
Chi Square Test for Goodness of Fit
?
I have got a discrete data
as given below (R script)
?
No_of_Frauds<-c(1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,2,1,2,2,2,1,1,2,1,1,1,1,4,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,5,1,2,1,1,1,1,1,1,1,3,2,1,1,1,2,1,1,2,1,1,1,1,1,2,1,3,1,2,1,2,14,2,1,1,38,3,3,2,44,1,4,1,4,1,2,2,1,3)
?
I am trying to fit Poisson
2007 Oct 09
1
Multivariate chi-square distribution function
Dear All,
Is there any function in R for computing "multivariate chi-square
distribution"?
How about "multivariate gamma distribution"?
I appreciate any comment on this subject.
Thank you,
Amin Zollanvari
PhD student
Department of Electrical and Computer Engineering,
Texas A&M University,
College Station, TX
2008 Aug 29
0
Problem with Poisson - Chi Square Goodness of Fit Test - New Mail
Dear R-help,
?
?
Chi Square Test for Goodness of Fit
?
I have got a discrete data
as given below (R script)
?
No_of_Frauds<-c(1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,2,1,2,2,2,1,1,2,1,1,1,1,4,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,5,1,2,1,1,1,1,1,1,1,3,2,1,1,1,2,1,1,2,1,1,1,1,1,2,1,3,1,2,1,2,14,2,1,1,38,3,3,2,44,1,4,1,4,1,2,2,1,3)
?
I am trying to fit Poisson
distribution to
2004 Mar 10
1
accuracy of chi-square distribution approximations
Hi there,
How accurate is the aproximation R makes to the Chi-Square distribution?
For example, if I run:
> qchisq(1/1000000,6)
[1] 0.03650857
how accurate is 0.0365 compared to the theoretical percentile? What kind
of approximations have been made in the software's algorithm? It woudl be
useful to know since I am working with tiny percentiles such as one
one-millionth and one
2011 Apr 22
1
Create 2x2 table from summary data and run chi square test.
R 2.12
windows 7
I am summary data that I would like to make into a 2x2 table representing counts positive vs. negative counts:
28/289 20/276
My table should look something like the following:
group1 group2
Positive 28 20
Negative 289 276
How can a (1) create the 2x2 table
(2) run a chi square test on the table?
I have tried the following code, but I
2008 Nov 07
4
chi square table
Hi,
How do we get the value of a chi square as we usually look up on the
table on our text book?
i.e. Chi-square(0.01, df=8), the text book table gives 20.090
> dchisq(0.01, df=8)
[1] 1.036471e-08
> pchisq(0.01, df=8)
[1] 2.593772e-11
> qchisq(0.01, df=8)
[1] 1.646497
>
nono of them give me 20.090
Thanks,
cruz
2024 Sep 17
0
Degree of freedom issue on chi-square test of goodness of fit
I am running chi-square test of goodness of fit, the observation data was
well groupped to observation freq. I assume the data obey the normal
distribution N(? ?^2), while ? and ?^2 are unknown. So I use their
estimation. Consequently, I calculated out the probabilities and input in
vector p
>x<-c(6,13,14,27,25,19,10,6) #observation freq>p<-c(0.0505, 0.0874, 0.1533, 0.2088, 0.2088,
2008 Jul 25
1
Chi-square parameter estimation
Hi. I have made 100 experiments of an M/M/1 queue, and for each one I have calculated both, mean and variance of the queue size. Now, a professor has told me that variance is usually chi-squared distributed. Is there a way in R that I can find the parameter that best fits a chi-square to the variance data? I know there's fitdistr()m but this function doesn't handle chi-square. I believe
2009 Jun 03
1
Validity of Pearson's Chi-Square for Large Tables
Is Pearson's Chi-Square test for contingency tables asymptotically unbiased
for large tables (large degrees of freedom) regardless of the expected
values in each cell? The rule of thumb is that Pearson's Chi-square should
not be used when large numbers of cells have expected values < 5. However,
I compared the results on 4x4 contingency tables for R's chisq.test using
chi-square
2006 Jun 30
2
Query : Chi Square goodness of fit test
I want to calculate chi square test of goodness of fit to test,
Sample coming from Poisson distribution.
please copy this script in R & run the script
The R script is as follows
########################## start
#########################################
No_of_Frouds<-
c(4,1,6,9,9,10,2,4,8,2,3,0,1,2,3,1,3,4,5,4,4,4,9,5,4,3,11,8,12,3,10,0,7)
N <- length(No_of_Frouds)
# Estimation of
2002 Sep 30
5
Chi-Square Distribution Plots
Dear list
I have a vector of values that allegedly have a chi-squared distribution. I
want to create a plot that shows the values I have obtained, and the
chi-squared distribution curve for the specified number of degrees of freedom
to show what should have been obtained.
At the moment I am plotting the values I have obtained as a histogram and
somehow want to put on to this plot the