The following are all very good. The first one is nice and succint. The second has some nice programming examples. The last one has a great front cover showing a photo of a train which plowed through a train station in Paris.
A Practical Guide to Data Analysis for Physical Science Students by Louis Lyons, Cambridge Press (1991) ISBN 0-521-42463-1
Data Reduction and Error Analysis for the Physical Sciences 2nd ed by P. Bevington and D. Robertson (1992) ISBN 0-07-911243-9
Experimentation - An Introduction to Measurement Theory and Experiment Design 3rd ed by D. C. Baird, Prentice Hall (1995) ISBN 0-13-303298-1
An Introduction to Error Analysis by John R. Taylor, University Science Books (1982) ISBN 0-935702-15