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My friend sent an Excel file: http://msemac.redwoods.edu/~darnold/temp/cyu01_iqscores.xls http://msemac.redwoods.edu/~darnold/temp/cyu01_iqscores.xls I opened it in Excel, saved is as cyu01_iqscores.csv, then imported it into R with: iqscores=read.csv('cyu01_iqscores.csv',header=TRUE) The result was: > head(iqscores) IQ.Sco...

Hi, We were wondering how we could make a stacked frequency diagram such as this one: http://msemac.redwoods.edu/~darnold/math15/liz.pdf We don't necessarily need the shaded "balls", other characters would be fine, such as stacks of x's. David

...t or welch's approximation of the degrees of freedom in order to make the distribution a t-distribution. However, most texts give no information why you have to do this. So I thought I try a little experiment which is outlined here. Distrubtion of differences of independent samples <http://msemac.redwoods.edu/~darnold/math15/R/chapter11/DistributionForTwoIndependentSamplesPartII.html> As you can see in the above link, I see no evidence why you need a pooled or Welch's in these images. Anyone care to comment? Or should I put this on Stack Exchange? D. -- View this message in...

Hi, I am encountering a difficulty I don't understand. Be patient, I'm very new to analysis of variance. If I load this data: example12_7=read.table("http://msemac.redwoods.edu/~darnold/math15/data/chapter12/example12_7.dat",header=TRUE) The run the oneway.test: oneway.test(time~drug,data=example12_7,var.equal=TRUE) I get these results: data: time and drug F = 4.1881, num df = 2, denom df = 16, p-value = 0.03445 Now, I've done the problem by h...

Hi, I'm looking for some ideas on how to reproduce the attached image in R. There are three samples, each of size n = 10. The first is drawn from a normal distribution with mean 60 and standard deviation 3. The second is drawn from a normal distribution with mean 65 and standard deviation 3. The third is drawn from a normal distribution with mean 70 and standard deviation 3.

...must record the 34 and perform the game 9,999 more times, each time recording the number of times that Peter is in the lead. So again, any thoughts on how to do this without for loops and "pushing?" Thanks for the help. Great list. David Arnold College of the Redwoods Eureka, CA http://msemac.redwoods.edu/~darnold/index.php -- View this message in context: http://r.789695.n4.nabble.com/Head-or-Tails-game-tp4639142.html Sent from the R help mailing list archive at Nabble.com.