Sanders, Donald H.
Statistics : a first course
McGraw-Hill , 2000
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Freund, John E.
Statistics : a first course
Prentice-Hall, 1981
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Sanders, Donald H.
Statistics : a first course
McGraw-Hill, 1995
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Anderson, Alan J.B.
Interpreting data: A first course in statistics
Chapman and Hall , 1989
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Freund, John E.
Business statistics: a first course
Prentice-Hall, 1974
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