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Chinese Gender Question and math

ExcitedtostartExcitedtostart member
in Babies on the Brain

First of all, Math is my worst subject. I'm dyslexic with repeating numbers, and had to take many math classes twice.

In one of the many classes, I remember this one problem - what are the chances you'll get a head/tails if you flip a coin? I said 50% and was wrong. I still don't understand the answer, but I remember it distinctly not being 50/50. Maybe the number of times you flipped it made a difference. 

So, taking this into account, if you took a Chinese Gender Predictor multiple times, would your answer still be 50/50? 

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Re: Chinese Gender Question and math

  • caffinated_tulipcaffinated_tulip member

    ::opens mouth::

    ::closes mouth::

    ::thinks about it::

    ....

     

     

    Yes. 

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  • HappyAardvarkHappyAardvark member

    From the interweb's trusty and always reliable panacea of knowledge, wikipedia:

    The outcome of coin flipping has been studied by Persi Diaconis and his collaborators. They have demonstrated that a mechanical coin flipper which imparts the same initial conditions for every toss has a highly predictable outcome ? the phase space is fairly regular. Further, in actual flipping, people exhibit slight bias ? "coin tossing is fair to two decimals but not to three. That is, typical flips show biases such as .495 or .503." 

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  • caffinated_tulipcaffinated_tulip member

    NO NO! Wait, I know the answer:

    It's totally not accurate if you use the Shettles method. Because that's science. ::nod:: 

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  • CinnamonBunCinnamonBun member
    imagekdodge423:
    imagefredalina:

    The coin flip is 50% no mater how many times you flip it.  It's actually SLIGHTLY off because of the design on the front and back making one ever so slightly heavier but in principle it's 50%.  Not sure why your math problem didn't indicate this but it must have been worded differently somehow.

    Thus the Chinese Gender Predictor is also 50%.

    Totally this. It's 50%. If you had a wooden coin and pained one side red and one side blue, there is a 50% chance of getting each color regardless of the number of time you threw it. It had to be something screwy in the problem wording. 

    Unless your teacher was like the one that my friend had in college who spent their entire class period proving 2+2 does not equal 4.

     

    huh?

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  • akaluttsakalutts member
    imagekdodge423:
    imagefredalina:

    The coin flip is 50% no mater how many times you flip it.  It's actually SLIGHTLY off because of the design on the front and back making one ever so slightly heavier but in principle it's 50%.  Not sure why your math problem didn't indicate this but it must have been worded differently somehow.

    Thus the Chinese Gender Predictor is also 50%.

    Totally this. It's 50%. If you had a wooden coin and pained one side red and one side blue, there is a 50% chance of getting each color regardless of the number of time you threw it. It had to be something screwy in the problem wording. 

    Unless your teacher was like the one that my friend had in college who spent their entire class period proving 2+2 does not equal 4.

     

    OMFG I HAD ONE OF THOSE TEACHERS! Drove me batshit crazy.

     

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