Grove, Susan K.
Statistics for nursing research : a workbook for evidence-based practice
Elsevier, 2017
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Levin, Jack
Elementary statistics in sosial research
Harper Collins, 1991
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Healey, Joseph F., 1945-
Statistics : a tool for social research
Cengage Learning, 2015
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Weiss, Robert S.
Statistics in social research : an introduction
N.Y. Wiley , 1968
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Fisher, Ronald A.
Statistics methods for research workers
Oliver and Boyd, 1950
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