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Math Help - Stats-How do you determine if an interval is usable?

  1. #1
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    Stats-How do you determine if an interval is usable?

    I was given data (not sure if I need it for you to help) and determined it was normal.
    I was asked to calculate a 95% confidence interval which I found to be b/w 142.06 and 150.98. Then I am asked if this inteval is usuable. How do I know if it is or isn't?
    Also, the point estimate is 146.5161
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by beetz View Post
    I was given data (not sure if I need it for you to help) and determined it was normal.
    I was asked to calculate a 95% confidence interval which I found to be b/w 142.06 and 150.98. Then I am asked if this inteval is usuable. How do I know if it is or isn't?
    Also, the point estimate is 146.5161
    The problem here is that the concept of usability is almost certainly related
    to the wider question, and not what you have told us.

    That is usability is not a statistical concept but belongs to the problem
    domain and if you don't tell us anything more we cannot answer your
    question.

    RonL
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