By James Miller, Jane C Miller
This renowned textbook provides a transparent account of the rules of the most statistical equipment utilized in glossy analytical laboratories. Such tools underpin top of the range analyses in components corresponding to the security of nutrients, water and drugs, environmental tracking, and chemical production. The therapy all through emphasises the underlying statistical principles, and no specified wisdom of arithmetic is needed. there are many labored examples, together with using Microsoft Excel and Minitab, and loads of pupil routines, lots of them in keeping with examples from the analytical literature.
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Extra info for Statistics and Chemometrics for Analytical Chemistry, Sixth Edition
Calculate the 95% confidence limits of the mean and use them to decide whether there is any evidence of systematic error. 05 M solution of a reagent of formula weight (relative molecular mass) 40 was made up, using weighing by difference. 0001 g: what were the standard deviation and relative standard deviation of the weight of reagent used? 05 ml. Express this as a relative standard deviation. Hence calculate the relative standard deviation of the molarity of the solution. Repeat the calculation for a reagent of formula weight 392.
27 mM respectively. There are six measurements and therefore five degrees of freedom. 57 and from Eq. 8 29 Presentation of results Since no quantitative result is of any value unless it comes with an estimate of the errors involved, the presentation of the results and the errors is important. A common practice is to quote the mean as the estimate of the quantity measured and the standard deviation as the estimate of the precision. Less commonly, the standard error of the mean is sometimes quoted instead of the standard deviation, or the result is given in the form of the 95% confidence limits of the mean.
88) is less than the critical value so the null hypothesis is retained: there is no evidence that the refluxing time affects the amount of tin found. 5. For the present, it is sufficient to consider only the two-tail values. 399.
Statistics and Chemometrics for Analytical Chemistry, Sixth Edition by James Miller, Jane C Miller