Journal of the Korean Data and Information Science Society

The Korean Data and Information Science Society (한국데이터정보과학회)
권호 표지

Bent coin toss probability

굽힌 동전의 확률

  • 우덕관 (송곡대학 사회복지상담과) ;
  • 오창혁 (영남대학교 통계학과)
  • Published : 2010.01.31
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Abstract

It is generally believed that teaching probability with the help of coin tossing has a long history. In textbooks about elementary probability or statistics, problems on unfair coins as well as fair ones are frequently given. However it is known that nobody has met an unfair coin with a fixed head probability which is different from 0.5 in flesh and blood. In this study a coin bent along with the middle line of the coin is suggested as an unfair one. By flipping bent coins with various angle, the ratios of head of the coins are obtained. The bent coins might be used as experimental tools for teaching of probability concept.

동전을 이용하여 확률의 개념을 가르치는 일은 오랫동안 이루어져 왔으며, 통계 교과서에는 공정한 동전과 그렇지 않은 동전에 관한 많은 문제가 제시되고 있다. 그러나, 공정하지 않은 동전을 실제로 만나본 사람은 없는 것으로 알려져 있다. 본 연구에서는 확률 학습에 사용될 공정하지 않은 동전으로 가운데가 굽혀진 동전을 제시한다. 또한, 여러 가지 각도로 굽혀진 동전의 앞면이 나올 확률을 던지기 실험을 통하여 추정한다. 굽혀진 동전은 통계학 수업에서 공정하지 않은 동전을 다루는 경우에 실습용으로 사용될 수 있을 것이다.

Keywords

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