Re: [R] QQ plot for normality testing

I have found this web page useful http://www.cms.murdoch.edu.au/areas/maths/statsnotes/samplestats/qqplot.html Your mileage may vary. Keith J "Matevz Pavlic" wrote in message news:ad5ca6183570b54f92aa45ce2619f9b901208...@gi-zrmk.si... > Hi all, > > > > I am trying to test wheater the distribu

Re: [R] QQ plot for normality testing

age- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Matevž Pavlic > Sent: Saturday, April 30, 2011 11:28 AM > To: r-help@r-project.org > Subject: [R] QQ plot for normality testing > > Hi all, > > > > I am trying to test wh

Re: [R] QQ plot for normality testing

, 2011 8:04 PM To: Matevž Pavlič Cc: r-help@r-project.org Subject: Re: [R] QQ plot for normality testing Hi, qqnorm basically plots your actual sample values against what the values would be (approximately) if they were from a normal distribution. qqline() adds a line through the 1st and 3rd

Re: [R] QQ plot for normality testing

Hi, qqnorm basically plots your actual sample values against what the values would be (approximately) if they were from a normal distribution. qqline() adds a line through the 1st and 3rd quartiles. So roughly speaking, if your QQ plot forms a straight line (particularly the one drawn by qqline)

[R] QQ plot for normality testing

Hi all, I am trying to test wheater the distribution of my samples is normal with QQ plot. I have a values of water content in clays in around few hundred samples. Is the code : qqnorm(w) #w being water content qqline(w) sufficient? How do I know when I get the plo