Random Choice and Related Methods

Author(s):  
Eleuterio F. Toro
Keyword(s):  
2019 ◽  
Author(s):  
Jetlir Duraj ◽  
Yi-Hsuan Lin

2014 ◽  
Vol 23 (11) ◽  
pp. 2023-2039 ◽  
Author(s):  
Paat Rusmevichientong ◽  
David Shmoys ◽  
Chaoxu Tong ◽  
Huseyin Topaloglu

1977 ◽  
Vol 5 (2) ◽  
pp. 97-103
Author(s):  
Lars Dahlin

A survey of the social and medical conditions of the population in three well-defined districts in Malmö was made in order to obtain background data for the planning of open care. A random choice was made of 70 households from each of the three residential areas for interview purposes. Available data concerning actual individuals were collected from the social and health authorities. Wide variations existed between the three districts. The inhabitants of Kroksbäck, mostly young families with children, were comparatively healthy somatically, whereas many had social problems; mental troubles were common too. In Lorensborg, the inhabitants did not conspicuously deviate from the average, as regards complaints. In Ellstorp, with its elderly population, two in three had impaired health, mostly in the form of somatic complaints; moreover their teeth were in poor condition. One in three of all interviewees had felt ill in some respect during the fortnight preceding the interview, and more than half had some current health problem. Eleven percent of all interviewees had sought medical advice during this fortnight. One in three of the interviewees was using prescribed remedies at the time of the interview. Eleven percent of those in the gainfully employable age range had been sick-listed for some part of the fortnight. The need for a general practitioner service, continuity of care, health centres and integration of social and medical care is discussed.


2005 ◽  
Vol 1 (4) ◽  
pp. 389-392 ◽  
Author(s):  
Oddmund Kleven ◽  
Frode Jacobsen ◽  
Raleigh J Robertson ◽  
Jan T Lifjeld

Why do females of many species mate with more than one male? One of the main hypotheses suggests that female promiscuity is an insurance mechanism against the potential detrimental effects of inbreeding. Accordingly, females should preferably mate with less related males in multiple or extrapair mating. Here we analyse paternity, relatedness among mating partners, and relatedness between parents and offspring, in the socially monogamous North American barn swallow ( Hirundo rustica erythrogaster ). In contrast to the inbreeding avoidance hypothesis, we found that extrapair mating partners were more related than expected by random choice, and tended to be more related than social partners. Furthermore, extrapair mating resulted in genetic parents being more related to their extrapair young than to their withinpair young. We propose a new hypothesis for extrapair mating based on kin selection theory as a possible explanation to these findings.


PEDIATRICS ◽  
1975 ◽  
Vol 56 (2) ◽  
pp. 254-254
Author(s):  
J R Coll

Picking a Derby winner and making a diagnosis have much in common. The inspirational punter relies on "having a feeling" or a pin stabbed at a race card. Some doctors use similar methods for diagnosis. They and the punters are overgenerous in remembrance of success; there is always a good excuse for the horse or diagnosis that was left at the start. But the racing form of a horse can be calibrated, and random choice be transmuted to calculated probability. The handicapper, like the doctor, seeks discriminative information to predict the order in which the runners should pass the winning post. Unlike the doctor, the handicapper then proceeds to eliminate discrimination to attempt a dead heat for the field. We are said to be a nation of gamblers, and if mathematical methods can be invoked for games of chance there is no reason why the nation's doctors should not readily apply mathematics to the serious business of the nation's diseases.


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