anonymous
  • anonymous
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?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
I know i can to id buy putting it in my TI but im kinda confused.
Psymon
  • Psymon
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.
anonymous
  • anonymous
So... Thats it?

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Psymon
  • Psymon
Just do it for all the finish times, yes. Assuming Im interpretting the question correctly, yeah.
anonymous
  • anonymous
Its geometry bud...
Psymon
  • Psymon
How is this geometry? O.o
anonymous
  • anonymous
@Directrix Can you help?
anonymous
  • anonymous
I dont know man, thats what i am trying to figure out!
Psymon
  • Psymon
Its a statistics question xD
anonymous
  • anonymous
but it was in my geometry lesson...
Psymon
  • Psymon
Dunno how. But this is a typical stats question.
anonymous
  • anonymous
Weird...
anonymous
  • anonymous
Geometric Probability Distributions
Psymon
  • Psymon
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.
anonymous
  • anonymous
|dw:1377147042414:dw|
Psymon
  • Psymon
That's how Id have done it.
anonymous
  • anonymous
Okay, so it wouldnt be|dw:1377147179820:dw|
Psymon
  • Psymon
No, 7 people didnt finish in 12 seconds :P
anonymous
  • anonymous
Alright just double checking! thanks!
Psymon
  • Psymon
Yep, np :3
anonymous
  • anonymous
Ahh okay that all makes sense now!
Directrix
  • Directrix
Your probabilities should add up to 1. Did you check?
Directrix
  • Directrix
Attached is a comment on this by @Valpey
Directrix
  • Directrix
P for probability. Use the proper notation. |dw:1377147899106:dw|

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