[R] expected value with R

[Henrik Alanko]

Dear recipient
I am using the r-program to do calculations with my data.
I would like to ask you how to calculate the expected value with R  
using this data? I only get an error message in response. Attached is  
my data.

Thank you for your kind answer!
Henrik Alanko
Faculty of statistics
Helsinki University
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 7.2000
 7.8500
 7.2500
7.450
7.520
7.1700
 6.9300
 7.5400
7.480
7.490
7.040
6.240
6.550
7.550
6.500
7.180
6.130
7.880
6.740
6.560
6.240
6.320
6.750
5.960
6.150
 6.050
 5.570
 5.920
4.300
4.680
5.360