6. Our advice
6.1 Make the effort to determine confidence intervals
Even if the approach may seem tedious to those new to it, determining confidence intervals using the tools described in this data sheet is an essential part of understanding these phenomena. The use of spreadsheets and the functions (Student and Chi-square) integrated into them enable this to be done without any effort other than that of understanding their usefulness. Comparing two apparently different averages or two standard deviations, a frequent industrial problem, can only lead to relevant conclusions if this effort has been made.
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Bibliography
Statistique théorique et appliquée , 2nd edition, Dagnelie P, De Bœck Université, 2007
Introductory Statistics with R, Dalgaardp, Springer, 2008
Statistics, theory and applications , Springer, 2004
Applied Statistices and Probability for Engineers , 4th edition, Montgomery D.C & Runger G.C, Whiley,...
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