Message-ID: <6F53C7DD-FC72-492E-8D92-AEF90E790131@auckland.ac.nz>
Date: 2009-03-05T23:53:46Z
From: Rolf Turner
Subject: Constructing a barplot in R
In-Reply-To: <22362753.post@talk.nabble.com>
On 6/03/2009, at 12:03 PM, SIrEllwood wrote:
>
> Hi all,
>
> 3. The probabilities are 0.06, 0.21, 0.24, 0.18, 0.14, 0.10, 0.04,
> 0.02 and
> 0.01 that an airline will
> receive 0,1,2,3,4,5,6,7 or 8 complaints per day about its luggage.Find
>
> e(x) and e(x^2)
>
> Give the R commands you use and the two numerical values.
>
> Use the sample function to simulate complaints over 500 days. Give
> the R command you use and draw a barplot of the simulated data.
> Comment on
> how the pattern
> you see relates to the probabilities in the question above.
>
> I think i have done the first part and got e(x) = 2.75 and e(x^2)=
> 10.59
>
> I have no idea how to simulate complaints over 500 days and draw a
> barplot.
>
> can anyone help?
From the Posting Guide:
Basic statistics and classroom homework: R-help is not intended for
these.
cheers,
Rolf Turner
P. S. Your homework question says ``Use the sample function'' So
read up
on the sample function:
?sample
You will also find ?barplot useful.
R. T.
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