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OpenSessame

  • 2 years ago

At a track meet, 50 people ran the 100-meter dash. 2 people finished in 11 seconds, 5 people finished in 12 seconds, 8 people finished in 13 seconds, 10 people finished in 14 seconds, 21 people finished in 15 seconds, 2 people finished in 16 seconds, and 2 people finished in 17 seconds. What is the probability distribution for the finish times?

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  1. OpenSessame
    • 2 years ago
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    I know i can to id buy putting it in my TI but im kinda confused.

  2. Psymon
    • 2 years ago
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    Well....each finish time has its own probability. Probability is (success/possibilities). So for our first time of 11 seconds. We have 50 runners, so 50 possibilities. We have 2 "successes" for 11 seconds, therefore thatprobability is 2/50. Just do the same thing with each finish result.

  3. OpenSessame
    • 2 years ago
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    So... Thats it?

  4. Psymon
    • 2 years ago
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    Just do it for all the finish times, yes. Assuming Im interpretting the question correctly, yeah.

  5. OpenSessame
    • 2 years ago
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    Its geometry bud...

  6. Psymon
    • 2 years ago
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    How is this geometry? O.o

  7. OpenSessame
    • 2 years ago
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    @Directrix Can you help?

  8. OpenSessame
    • 2 years ago
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    I dont know man, thats what i am trying to figure out!

  9. Psymon
    • 2 years ago
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    Its a statistics question xD

  10. OpenSessame
    • 2 years ago
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    but it was in my geometry lesson...

  11. Psymon
    • 2 years ago
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    Dunno how. But this is a typical stats question.

  12. OpenSessame
    • 2 years ago
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    Weird...

  13. OpenSessame
    • 2 years ago
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    Geometric Probability Distributions

  14. Psymon
    • 2 years ago
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    I see. Its just called that, it doesnt really have anything to do with what we think of in geometry. Just looked it up, lol.

  15. OpenSessame
    • 2 years ago
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    |dw:1377147042414:dw|

  16. Psymon
    • 2 years ago
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    That's how Id have done it.

  17. OpenSessame
    • 2 years ago
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    Okay, so it wouldnt be|dw:1377147179820:dw|

  18. Psymon
    • 2 years ago
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    No, 7 people didnt finish in 12 seconds :P

  19. OpenSessame
    • 2 years ago
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    Alright just double checking! thanks!

  20. Psymon
    • 2 years ago
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    Yep, np :3

  21. Directrix
    • 2 years ago
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    @OpenSessame Read this: http://openstudy.com/study#/updates/502a720fe4b0ac7df90cca26

  22. OpenSessame
    • 2 years ago
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    Ahh okay that all makes sense now!

  23. Directrix
    • 2 years ago
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    Your probabilities should add up to 1. Did you check?

  24. Directrix
    • 2 years ago
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    Attached is a comment on this by @Valpey

  25. Directrix
    • 2 years ago
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    P for probability. Use the proper notation. |dw:1377147899106:dw|

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