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  1. 12-14-2010, 09:46 AM #1
    2forISU
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    Help on Confidence Interval and Hypothesis Testing

    I have a final tonight in my MBA program and struggling on these two items. Does anyone have a resource that they use to better understand how to setup and interpret these two statistical problems? The professor is looking for us to set it up, compute it, draw it, and interpret the results.

    Appreciate any help.
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  2. 12-14-2010, 09:47 AM #2
    CycoCyclone
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    Re: Help on Confidence Interval and Hypothesis Testing

    I think Sigma XL has a 30 day trial
    John Walters is my hero
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  3. 12-14-2010, 09:47 AM #3
    CycoCyclone
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    Re: Help on Confidence Interval and Hypothesis Testing

    I use the professional version for my Lean Six Sigma projects
    John Walters is my hero
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  4. 12-14-2010, 09:52 AM #4
    3TrueFans
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    Re: Help on Confidence Interval and Hypothesis Testing

    Statistics are the devil.
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  5. 12-14-2010, 09:53 AM #5
    cstrunk
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    Re: Help on Confidence Interval and Hypothesis Testing

    Quote Originally Posted by 3TrueFans View Post
    Statistics are the devil.
    Agreed.

    Good luck.
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  6. 12-14-2010, 09:56 AM #6
    HOTDON
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    Re: Help on Confidence Interval and Hypothesis Testing

    Our LSS process is built around Minitab, which also has a free trial and a few instuctional videos available.
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  7. 12-14-2010, 10:16 AM #7
    CivEFootball
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    Re: Help on Confidence Interval and Hypothesis Testing

    DO YOUR OWN WORK CHEATER!
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  8. 12-14-2010, 10:20 AM #8
    CycoCyclone
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    Re: Help on Confidence Interval and Hypothesis Testing

    Quote Originally Posted by CivEFootball View Post
    DO YOUR OWN WORK CHEATER!
    The real world wouldn't rely on him to do this by hand. Just tryin to help a brother out, but APPARENTLY a haters gotta hate
    John Walters is my hero
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  9. 12-14-2010, 10:22 AM #9
    2forISU
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    Re: Help on Confidence Interval and Hypothesis Testing

    Quote Originally Posted by CivEFootball View Post
    DO YOUR OWN WORK CHEATER!
    Is there a problem posted? Looking for material to get a better understanding
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  10. 12-14-2010, 10:34 AM #10
    jmb
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    Re: Help on Confidence Interval and Hypothesis Testing

    Quote Originally Posted by CivEFootball View Post
    DO YOUR OWN WORK CHEATER!
    good grief-there is no cheating. he is looking to get a better understanding. he isn't asking someone to take his test.
    jmb
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  11. 12-14-2010, 10:48 AM #11
    Wesley
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    Re: Help on Confidence Interval and Hypothesis Testing

    Always go to wickipedia:

    Confidence interval - Wikipedia, the free encyclopedia

    Statistical hypothesis testing - Wikipedia, the free encyclopedia

    Brains for free and very basic.
    Looking forward to CFH magic for the next bball season, Georges style.
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  12. 12-14-2010, 10:53 AM #12
    Cyclophile1
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    Re: Help on Confidence Interval and Hypothesis Testing

    Quote Originally Posted by Wesley View Post
    Always go to wickipedia:

    Confidence interval - Wikipedia, the free encyclopedia

    Statistical hypothesis testing - Wikipedia, the free encyclopedia

    Brains for free and very basic.
    I would also recommend you read up on a couple of the sections at StatSoft, online statistical textbook:

    Elementary Concepts in Statistics

    look for annotated examples on the left sidebar under "Basic Statistics"

    Then just blow his mind by asking him this in a sidebar conversation:

    "Do you recommend the Yates continuity correction in this case? I have been going back and forth on it"
    Last edited by Cyclophile1; 12-14-2010 at 10:55 AM.
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  13. 12-14-2010, 11:04 AM #13
    edr247
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    Re: Help on Confidence Interval and Hypothesis Testing

    Little confused as to what you need from these, as they are broad topics. Do you have any example problems or anything like that?

    Anyway, here's some Googled info for you. Perhaps it can help?

    Confidence Intervals & Hypothesis Testing (1 of 5)
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  14. 12-14-2010, 11:41 AM #14
    2forISU
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    Re: Help on Confidence Interval and Hypothesis Testing

    Here is a sample:

    A sample of 11 circuits from a large normal population has a mean resistance of 2.20 ohms. We know from past testing that the population standard deviation is .35 ohms.

    Solution:=2.20+1.96(0.35/square root of 11)
    =2.20+0.2068
    =1.9932<mean<2.4068

    How does he come up with this solution?
    Last edited by 2forISU; 12-14-2010 at 11:44 AM.
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  15. 12-14-2010, 11:45 AM #15
    CycloneNorth
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    Re: Help on Confidence Interval and Hypothesis Testing

    Its the mean +or- the Z value (which you get from a distribution table, 95% always equals 1.96 if the distribution is normal) * std dev / sqr root of samples.

    Mean +/- Z * (std dev/sqr root ( # of samples) = Confidence Interval
    Last edited by CycloneNorth; 12-14-2010 at 11:54 AM.
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