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    Sample Mean, Standard Deviation & Confidence Interval

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    The State test scores for 12 randomly select High School Senior are shown below:
    "Assume the population is normally distributed"
    1425 1227 985
    699 723 837
    726 744 542
    621 1445 949

    a) Find the Sample Mean
    _
    X = ________ Round to one decimal place as needed

    b) Find the Sample Standard Deviation
    S = ________ Round to one decimal place as needed

    c) Construct a 90% confidence interval for the population mean μ (_______,_______)
    Round to one decimal place as needed.

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    https://brainmass.com/statistics/confidence-interval/sample-mean-standard-deviation-confidence-interval-264179

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    The State test scores for 12 randomly select High School Senior are shown below:
    "Assume the population is normally distributed"
    1425 1227 985
    699 723 837
    726 744 542
    621 1445 949

    a) Find the Sample Mean
    ...

    Solution Summary

    The sample mean, standard deviation and confidence intervals for state test scores in high school are examined.

    $2.19

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