Math Survey Question

Discussion in 'General Off-Topic Chat' started by Zetta_x, Dec 7, 2012.

?

What is the answer?

Poll closed Dec 10, 2012.
  1. 10

    1 vote(s)
    2.0%
  2. 15

    5 vote(s)
    10.2%
  3. 25

    0 vote(s)
    0.0%
  4. 12

    41 vote(s)
    83.7%
  5. 20

    0 vote(s)
    0.0%
  6. 6

    2 vote(s)
    4.1%
  7. 18

    0 vote(s)
    0.0%
Dec 7, 2012

Math Survey Question by Zetta_x at 9:01 PM (1,654 Views / 0 Likes) 48 replies

  1. Zetta_x
    OP

    Member Zetta_x The Insane Statistician

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    If you have 4 observations that have an average of 10 and the 5th observation is 20, what is the average of all the observations. Please spoiler your answers and answer in the poll :)

    Poll closes in 3 days :)
     


  2. Sterling

    Member Sterling GBAtemp's Silver Hero

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    So all 4 observations average out to 10, with the addition of 20 because of the 5th observation? Or is it that I have 4 observations, each of which averages out to a 10 and the fifth on is 20.

    My answer

    Actually you'll get the same answer either way now that I think about it.
     
  3. Zetta_x
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    Member Zetta_x The Insane Statistician

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    Thanks for the responses so far :)
    I'm trying to figure out different logical patterns that people take when coming up to a problem that may have not seen.
     
  4. FAST6191

    Reporter FAST6191 Techromancer

    pip
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    [Being a bastard]
    Mean, median or mode?
    [/being a bastard]
     
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  5. Zetta_x
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    Member Zetta_x The Insane Statistician

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    I'm so glad you have mentioned that. I honestly predicted that if I were to say mean, it would blow over most people's heads. Mean is a very picky term that I feel the average would not be able to pick up one (so the mean)
     
  6. Foxi4

    Reporter Foxi4 On the hunt...

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    That's actually pretty easy...

    Warning: Spoilers inside!
     
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  7. gifi4

    Member gifi4 How am I a 'New Member'?

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    Simple.
    Warning: Spoilers inside!
     
  8. Issac

    Member Issac Mini-mod

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    Warning: Spoilers inside!

    Quite easy indeed. However, I got 39 / 36 on my statistics and probability exam. (not a typo)
     
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  9. Vulpes Abnocto

    Former Staff Vulpes Abnocto Drinks, Knows Things

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    Warning: Spoilers inside!
     
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  10. Zetta_x
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    Member Zetta_x The Insane Statistician

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    I teach a statistics class and I shit you not, someone had put an average greater than the maximum value.
     
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  11. Maxternal

    Member Maxternal Peanut Gallery Spokesman

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    dang it, I just answered randomly before I saw there was actually a question in the op :(
     
  12. marcus134

    Member marcus134 GBAtemp Advanced Fan

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    Warning: Spoilers inside!
     
  13. Alexrose

    Member Alexrose Untitled

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    Warning: Spoilers inside!

    This is literally primary school maths; why are you acting like we should spoiler this stuff?
     
  14. Zetta_x
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    Member Zetta_x The Insane Statistician

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    Alex, the purpose is that every vote is independent. If you show your answer, the votes have dependence amongst them. Do you know the definition of what it means for each observation to be uncorrelated?

    There once was a post on facebook with elementary math (the one that had the order of operations). I think as much as 1/3 to 1/2 half got it wrong.

    Thank you for being a douchebag and not put spoiler tags when you clearly see that I have asked to do so.

    ---

    The logical step that people will miss is how you got 40. A few people look like they just took the average between 20 and 10 which is 15.

    Tl;dr the arithmetic was designed to be easy, but it was not a test of arithmetic, it was a test of logic and problem solving.
     
  15. Tom

    Member Tom Gbatemp's Unofficial Modder

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    Are we just doing your HW?
     
  16. Sterling

    Member Sterling GBAtemp's Silver Hero

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    No, he's a statistics teacher. If you'd read the topic, you'd figure that out. Even if it was his homework, he wouldn't have asked us a single question this simple.
     
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  17. Tom

    Member Tom Gbatemp's Unofficial Modder

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    It doesn't say that in the topic, Looking at his profile you see it, not on the topic
     
  18. Coto

    Member Coto GBAtemp Addict

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    If you have 4 observations that have an average of 10 and the 5th observation is 20, what is the average of all the observations. Please spoiler your answers and answer in the poll :)

    Warning: Spoilers inside!

    Or

    Warning: Spoilers inside!

    That is, considering basis of 10 as total for every observation, or 40, being 10 for each observation, then simply adding the fifth observation, and its valuew
     
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  19. Sterling

    Member Sterling GBAtemp's Silver Hero

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    This says otherwise. >.>
     
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  20. Saken

    Member Saken GBAtemp Fan

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    Warning: Spoilers inside!
     

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