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  1. #1
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    Confidence interval.

    A bus company official wanted to estimate the mean time for the trip between two cities.A random sample of such trips gave a mean of 152 minutes and a standard deviation of 12 minutes.Construct a 98% confidence interval for the population mean time.

    show me the solution how to do this question...thx
    Last edited by mr fantastic; July 6th 2011 at 03:36 PM. Reason: Re-titled.
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  2. #2
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    Re: Probability

    hi there, do you how many samples were taken?

    This is kind of important for constructing a conficence interval.
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  3. #3
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    Re: Confidence interval.

    Quote Originally Posted by SLJSWW View Post
    A bus company official wanted to estimate the mean time for the trip between two cities.A random sample of such trips gave a mean of 152 minutes and a standard deviation of 12 minutes.Construct a 98% confidence interval for the population mean time.

    show me the solution how to do this question...thx
    Your class notes and/or textbook will certainly explain what you have to do and have clear examples on how to do it. Have you read them? Where are you stuck?
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