UID:
almahu_9949199503602882
Format:
XXXIV, 652 p.
,
online resource.
Edition:
3rd ed. 1999.
ISBN:
9781461214465
Content:
1. 1 Typical Problems of Data Analysis Every branch of experimental science, after passing through an early stage of qualitative description, concerns itself with quantitative studies of the phe nomena of interest, i. e. , measurements. In addition to designing and carrying out the experiment, an importal1t task is the accurate evaluation and complete exploitation of the data obtained. Let us list a few typical problems. 1. A study is made of the weight of laboratory animals under the influence of various drugs. After the application of drug A to 25 animals, an average increase of 5 % is observed. Drug B, used on 10 animals, yields a 3 % increase. Is drug A more effective? The averages 5 % and 3 % give practically no answer to this question, since the lower value may have been caused by a single animal that lost weight for some unrelated reason. One must therefore study the distribution of individual weights and their spread around the average value. Moreover, one has to decide whether the number of test animals used will enable one to differentiate with a certain accuracy between the effects of the two drugs. 2. In experiments on crystal growth it is essential to maintain exactly the ratios of the different components. From a total of 500 crystals, a sample of 20 is selected and analyzed.
In:
Springer Nature eBook
Additional Edition:
Printed edition: ISBN 9781461271475
Additional Edition:
Printed edition: ISBN 9780387984988
Additional Edition:
Printed edition: ISBN 9781461214472
Language:
English
DOI:
10.1007/978-1-4612-1446-5
URL:
https://doi.org/10.1007/978-1-4612-1446-5
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