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Thread: Confidence Interval

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    Confidence Interval




    A nutrition researcher wants to determine the mean fat content of hens eggs. She collects a sample of 40 eggs. She calculates a mean fat content of 23 grams, with a sample standard deviation of 8 grams. From the statistics she calculates a 90% confidence interval of [20.9 grams, 25.1 grams].

    What can the researcher do to decrease the width of the confidence interval?

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    confidence interval


    I've completed some reading on this but i'm confused. My first thought was that researcher could decrease the confidence level to decrease the width of the confidence interval; however, later in my reading I discovered that as the sample size increases, the confidence interval decreases....Now this has completely thrown me off basis.

    HELP

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