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Math Help - Critical Value and TS score

  1. #1
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    Critical Value and TS score

    Manufacturer claims that its MX200 tires last for more than 5 years before they need to replaced. To test this claim at 95% confidence interval you took a sample of 12 customers who bought MX200 tires and found that the mean time of their tires was 6.25 years and a standard deviation of 1.5 years.

    What is the critical Value (t-score) for this experiment

    What is the test Statistics for this experiment

    Is this a right,left,one,two tail hypothesis

    Does it reject Fail to reject or there is no sufficient data to support the claim


    Thank you
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  2. #2
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    Are you asking for someone to do this problem for you? It would help to get a meaningful answer, if you stated how comfortable you are with the subject matter, and in what areas you need assistance.
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  3. #3
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    Quote Originally Posted by ANDS! View Post
    Are you asking for someone to do this problem for you? It would help to get a meaningful answer, if you stated how comfortable you are with the subject matter, and in what areas you need assistance.
    I was asking for someone to show me the way mostly i do not want it solved becuase that way i wont learn it.
    Not really familiar with this one i missed some classes this summer due to family issues!

    Thank you
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