search for: contaminated

Hello, I have some data covering contaminant concentrations in fish over a time period of ~35 years. Each year, multiple samples of fish were taken (with varying sample sizes each year). Ultimately, I want an estimation of the variance between years, and the variance within years + random effects. I used a linear mixed model to estimate these variances, but after reading a number of different

Hello everyone, I have a plot showing chloride concentrations for various point over time. I also have a dotted line that show the Secondary Maximum Contaminant Level (my screening limit) on the graphs at 250 mg/L. But I can not figure out how to include the dotted line / Secondary Maximum Contaminant Level in the legend. Any thoughts? My code is as following and is linked to my data on the

...simple linear mixed model using 5% contamination with a normal with 3 times the standard deviation, which seems to be a common assumption. Simulation results indicate that when the random effects are normally distributed this estimator is about 3% less efficient, while when the random effects are contaminated with 5% outliers the estimator is about 23% more efficient, where by 23% more efficient I mean that one would have to use a sample size about 23% larger to obtain the same size confidence limits for the parameters. Question? I wonder if there are other distributions besides a mixture or normals....

Dear experts, Helps are badly needed. I'm trying to generate a panel data with error term from N(0,1) and alpha from U(0,20).Explanatory variables are from multivariate std normal distn. Problem arised when I tried to contaminate the data in Y by adding additional term from N(50,1). I ask the computer to choose 5 random data from Y by using the command runif(5,1,50) since we have 50 data

I just glanced at the problem but I think you would have to create a new variable to replace the hline. What about adding some text annotation in the graph instead? On Tuesday, September 26, 2017, 3:51:46 PM EDT, David Doyle <kydaviddoyle at gmail.com> wrote: Hello everyone, I have a plot showing chloride concentrations for various point over time. I also have a dotted line that

Well, here is one way but it seems a bit clumsy. In words, I created a new data.frame with "250" in the Chloride vector and "SMCL" in the Detections vector and supplessed one legend. Warning: For my convenience I am using different data.frame names . library(ggplot2) MyData <-read.csv("http://doylesdartden.com/Stats/TimeSeriesExample.csv", sep=",")

TB --- 2008-08-27 11:26:00 - tinderbox 2.3 running on freebsd-stable.sentex.ca TB --- 2008-08-27 11:26:00 - starting RELENG_7 tinderbox run for amd64/amd64 TB --- 2008-08-27 11:26:00 - cleaning the object tree TB --- 2008-08-27 11:26:30 - cvsupping the source tree TB --- 2008-08-27 11:26:30 - /usr/bin/csup -r 3 -g -L 1 -h localhost -s /tinderbox/RELENG_7/amd64/amd64/supfile TB --- 2008-08-27

Dear all, I?m analyzing this dataset containing biodiversity indices, measured over time (Week), and at various contaminant concentrations (Treatment). We have two replicates (Replicate) per treatment. I?m looking for the effects of time (Week) and contaminant concentration (Treatment) on diversity indices (e.g. richness). Initial analysis with GAM models showed temporal autocorrelation of

...y brief description. In the monte carlo, I first sample from a multivariate distribution to create data. The data are hypothetical student scores on an achievement test over time and the aim is to examine what happens to standard errors under certain psychometric conditions. The data are then "contaminated" to reflect a certain psychometric problem that occurs in longitudinal analyses of student achievement scores. These data are then analyzed using a linear model to obtain parameter estimates. This is replicated 250 times. For example, the model equation used is Y_{ti} = \mu + \beta \cdot...

Hi, I try to make an analyses to discover what is the time that an area begin to have spacial autocorrelation. And after, what is the number of individuals responsible for this autocorrelation. The main idea is to discover if exist a contamination of a quadrat from others quadrats and how is the population needed to make this contamination. This is very common to use automata to simulate

hi all, I''ve built a simple javascript datepicker for use with Rails. I''m sure others exist, but think this one is quite decent without being overengineered. http://projects.exactlyoneturtle.com/date_picker/ At present there''s no Rails HTML generator method for it; later I will package it in a script/generator, but for now it is quite easy to use with Rails and

I look at your article, and it did not change my view about profile. As we did not use any roaming/mandatory profile, nor we have any redirection. the only roaming we have is dedicated to few users and we use NFS as they are under linux, and way more simpler to set up. Strangely we do not have problems with those profiles. Maybe I am in a situation were : "You can't see the wood for the

TB --- 2008-07-29 09:37:14 - tinderbox 2.3 running on freebsd-stable.sentex.ca TB --- 2008-07-29 09:37:14 - starting RELENG_7 tinderbox run for sparc64/sparc64 TB --- 2008-07-29 09:37:14 - cleaning the object tree TB --- 2008-07-29 09:37:32 - cvsupping the source tree TB --- 2008-07-29 09:37:32 - /usr/bin/csup -r 3 -g -L 1 -h localhost -s /tinderbox/RELENG_7/sparc64/sparc64/supfile TB ---

OK for the local profiles. I got both of them one call joe and the other domain.joe. Saw it, no problem about that. I copied the data from local to domain one. The thing is that after few days the domain.joe was emptied. The joe did stay the same. And I do not get why the domain.joe got blanked (all data gone) Cheers for the help Meilleures salutations / Best regards, Joseph-Andr? GUARAGNA

Oof. :( Offhand, I can’t think of any place in particular. As one might imagine, accommodating 50+ people isn’t always super easy for places to do. Suggestions welcome! On Tue, Dec 24, 2019 at 10:27 AM Sean Silva <chisophugis at gmail.com> wrote: > It looks like Tied House will be shutting down :( Do we have a replacement > venue? > > >

Hi! I'm comparing the differences in contaminant concentration between 2 different groups of people ( N=36, N=37). When using a simple linear regression model I found no differences between groups, but when evaluating the diagnostic plots of the residuals I found my independent variable to have deviations from normality (even after log transformation). Therefore I have used bootstrap on

Dear list members, Can anyone tell me how the notches in boxplot(Y~X,notch=T) are calculated? What do these notches represent exactly? I?d suppose they are Conficence Intervals for the median, but I?ve also been told they might show Least Significant Difference (LSD) equivalents. I would very much appreciate any help from you. Best regards Chris.

...distributions is normal (Wilcox 2005) Surprisingly (to me) many sources seem quite evasive on clearly defining the pearson correlation. Reading the literature I was pretty much convinced that the correlation coefficient is not robust to outliers. The literature is also convincing on the impact of contaminated normal, heavy-tailed distributions on parametric tests (invalidating their results). However, I'm not clear on the distributional assumptions on the data: - does the data have to be bivariate normal in order to correctly estimate the linear correlation? - does the data have to be univariate nor...

PLEASE CONFIGURE YOUR AUTORESPONSERS TO NOT SEND MESSAGES TO PEOPLE WHO POST IN MAILING LISTS YOU SUBSCRIBE TO. This is an extremely rude thing to allow, and is becoming increasingly common, especially with users of the Asterisk-Users list. Daryl _____ From: s.speckenheuer@posservice.de [mailto:s.speckenheuer@posservice.de] Sent: Friday, February 04, 2005 6:41 PM To: Daryl G.

Hi all, I''ve got a slight problem with using Ferret in unit tests. In order to create as little cross-contamination between test suites as possible, some of my tests are creating a fresh index per test case, and then calling Index#close and deleting the containing dir during the teardown. The problem comes when GC.start kicks in after the deleting the directory: IOError: IO Error