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Stat help

  1. Jun 21, 2010 #1
    Hi, I need help understanding how do I use t-distribution to estimate the tα/2 . Also what is meant when it asks "verify your result with empirical rule"
     
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  3. Jun 21, 2010 #2

    EnumaElish

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    Do you understand what α is?
     
  4. Jun 21, 2010 #3
    no i dont, what is it?
     
  5. Jun 21, 2010 #4

    EnumaElish

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    It is the level of probability to be used for testing. The probability that the result is due to chance.

    Do you know what a probability distribution is?
     
  6. Jun 21, 2010 #5
    Basically i'm working on a problem that asks that part of the question. I have solved for the population mean, and have different samples with 3 data in them. I calculated the x-bar of those samples with the standard dev and have gotten their confidence intervals.
     
  7. Jun 21, 2010 #6

    EnumaElish

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    That's all very good; how does your original question about the t distribution relate to the rest?
     
  8. Jun 21, 2010 #7
    here is the question:

    - Find the population mean and its standard deviation
    - List all possible samples of size 3 from those 5 units
    - From each sample, compute the mean, standard deviation, and 95% confidence interval. Use t-distribution to estimate the tα/2 because we have a small size.
     
  9. Jun 22, 2010 #8
    Questions like this belong in the Homework forum. Please post there next time. Hey, I don't make the rules around here.
     
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