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http://www.openoffice.org/issues/show_bug.cgi?id=90759
User discoleo changed the following:
What |Old value |New value
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CC|'regina,troodon' |'discoleo,regina,troodon'
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------- Additional comments from [EMAIL PROTECTED] Mon Jun 16 15:25:49 +0000
2008 -------
Well, I am glad you figured out the R-syntax. You can access the help in R
using:
> help('z.test')
[or whatever command you wish to know about]
Just to remove some confusion:
1.) one sided and single-tailed are the same
[similarly 2-sided / 2-tailed are the same]
2.) statistical tests should be almost always 2-sided
[one sided tests are necessary only in rare instances]
3.) R-syntax (with default values / possible options)
z.test(x, mu = 0, stdev, alternative = c("two.sided", "less", "greater"),
sd = stdev, conf.level = 0.95, ...)
e.g. (you can copy / paste these lines in R)
x <- c(90,95,95,100)
z.test(x, mu = 100, sd = 5,'greater') # one-sided greater
z.test(x, mu = 100, sd = 5,'less') # one sided less
z.test(x, mu = 100, sd = 5,'two.sided')# two sided
z.test(x, mu = 100, sd = 5 ) # two sided by default
z.test(x, mu = 100, sd = sd(x) ) # compute the SD automatically
Just some words on using the z-test for people who did NOT figure out yet how to
do it in R:
- you need first to install the TeachingDemos:
go to the Menu: Packages -> Install packages ->
-> select the mirror server -> select TeachingDemos
- you need now to Load the package:
go to the Menu: Packages -> Load package -> select TeachingDemos
- Done.
> I'm now convinced that 'one-sided' is the correct description for
> what Excel does
Good to know, though I'll stick with R for serious statistics. ;-)
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