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13h25mn
2009 Mar 11
2
t-test, survey data
*How can I do a t-test with survey data?*
Thanks.
Marie
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Le Bureau f?d?ral du Plan f?te ses 50 ans en 2009.
Het Federaal Planbureau viert zijn 50-ste verjaardag in 2009.
The Federal Planning Bureau celebrates its 50-th anniversary in 2009.
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