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15 results on '"Gerss J"'

1. Digitale Brust-Tomosynthese plus synthetisches Bild versus digitale Vollfeld-Mammografie im populationsbezogenen Screening (TOSYMA): Protokoll einer randomisierten, kontrollierten Studie

Author

Weigel, S, additional, Gerß, J, additional, Hense, HW, additional, Krischke, M, additional, Sommer, A, additional, Czwoydzinski, J, additional, Lenzen, H, additional, Kerschke, L, additional, Spieker, K, additional, Dickmänken, S, additional, Baier, S, additional, Urban, M, additional, Hecht, G, additional, Heidinger, O, additional, Kieschke, J, additional, and Heindel, W, additional

Published
2018
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3. Nicht signifikant - was nun?

Author

Gerss J

Subjects
business.industry, Statistical significance, Metric (mathematics), Econometrics, Obstetrics and Gynecology, Medicine, Decision rule, p-value, Null hypothesis, business, Control (linguistics), Confidence interval, Outcome (probability)
Abstract

In a statistical significance test a scientific problem is expressed by formulating a null hypothesis and an opposite alternative. Construction of an empirical decision rule usually focuses on control of the alpha-error, i.e. the probability of erroneously refusing the null hypothesis. Contrary to the alpha-error, the beta-error is not controlled and in general is of unknown size. Thus in case of a non-significant result the validity of the null hypothesis still may be highly questionable. Such an unwanted outcome of an applied test the researcher should try to avoid by choosing an appropriate study design. In case it occurs nevertheless, it is advised to further evaluate the (non-significant) result. This can be done by calculating confidence intervals of the tested effects. Furthermore the p-value can be interpreted as a metric measure of evidence against the null hypothesis. By means of a posterior power analysis the probability of a significant test result is estimated under the given circumstances. Thus possibly the applied test--under the assumption of actual validity of the alternative--turns out to have had hardly a chance of rejecting the null hypothesis. In this case the non-significant result (pointing towards the null hypothesis) is relativized substantially. On the other hand a large power points to a small probability of a beta-error.

Published
2006
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4. Feasibility of Intensive Multimodal Therapy in Infants Affected by Rhabdoid Tumors – Experience of the EU-RHAB registry

Author

Seeringer, A., additional, Bartelheim, K., additional, Kerl, K., additional, Hasselblatt, M., additional, Leuschner, I., additional, Rutkowski, S., additional, Timmermann, B., additional, Kortmann, R.-D., additional, Koscielniak, E., additional, Schneppenheim, R., additional, Warmuth-Metz, M., additional, Gerß, J., additional, Siebert, R., additional, Graf, N., additional, Boos, J., additional, and Frühwald, M., additional

Published
2014
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7. Prediction of lymph node metastases in NSCLC

Author

Beyer, F., primary, Buerke, B., primary, Gerss, J., additional, Scheffe, K., additional, Puesken, M., additional, Weckesser, M., additional, Schober, O., additional, Heindel, W., additional, and Wessling, J., additional

Published
2010
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