Hello, I'm a first semester statistics student<http://r.789695.n4.nabble.com/Question-regarding-error-quot-x-and-y-lengths-differ-quot-td4665773.html#>and I am using R for roughly the third time ever. I am following a tutorial and yet I still get the error "x and y lengths differ." I am very new to this program, and I have searched for solutions, but because I do not understand the program too well, I am not sure which solution may apply to me. Any help is much appreciated!
The question is as follows: Do this given your population standard deviation. If we pick a confidence interval, say á = 0.1(90% confidence), we can compute a confidence interval for our measure of the population mean for each one of our samples. Now let¢s compute and plot the confidence intervals for the 50 samples:> m = 50; n = 40; mu = mean(pop); sigma = sd(pop); > SE = sigma/sqrt(n) # Standard error in mean > alpha = 0.10 ; zstar = qnorm(1-alpha/2); # Find z for 90% confidence > matplot(rbind( samp_mean - zstar*SE, samp_mean + zstar*SE),rbind(1:m,1:m), type="l", lty=1); > abline(v=mu) I am receiving the error "Error in xy.coords(x, y, xlabel, ylabel, log = log) : 'x' and 'y' lengths differ" when inputting >matplot(rbind( samp_mean - zstar*SE, samp_mean + zstar*SE),rbind(1:m,1:m), type="l", lty=1); Thank you very much! [[alternative HTML version deleted]]
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