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2Â¥2011-01-18 12:22:30
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> x=c(1390, 1597, 1597, 1643, 1651, 1667, 1675, 1679, 1686, 1695, 1734, 1748, 1758,
+ 1779, 1782, 1789, 1792, 1801, 1806, 1807, 1823, 1827, 1849, 1886, 1943, 2014)
>
>
>
> y=c(1268, 1405, 1414, 1424, 1435, 1436, 1438, 1450, 1451, 1463, 1464, 1475, 1485,
+ 1488, 1498, 1500, 1505, 1510, 1513, 1529, 1543, 1547, 1556, 1559, 1573, 1578, 1586, 1586,
+ 1589, 1608, 1616, 1624, 1650, 1650, 1681, 1712, 1791)
>
> t.test(x,y)  

        Welch Two Sample t-test

data:  x and y
t = 7.4124, df = 46.308, p-value = 2.117e-09
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
158.1671 276.0658
sample estimates:
mean of x mean of y
1746.846  1529.730

> length(x)
[1] 26
> length(y)
[1] 37
> t.test(x[-c(1,2,3,24,25,26)],y[-c(1,2,3,35,36,37)])

        Welch Two Sample t-test

data:  x[-c(1, 2, 3, 24, 25, 26)] and y[-c(1, 2, 3, 35, 36, 37)]
t = 11.738, df = 41.504, p-value = 9.069e-15
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
184.4879 261.1283
sample estimates:
mean of x mean of y
1749.550  1526.742

>
3Â¥2011-01-19 18:27:53
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4Â¥2011-02-07 08:23:57
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