Confidence Interval for a Mean

    Confidence Level (in decimal)

    Number of Samples

    Independent or dependent samples?

    INDEPENDENTDEPENDENT

    Input type

    SAMPLE STATISTICSDATA

    Distribution Type to Use?

    NORMALSTUDENT-t
    Enter Population Standard Deviations

    Variance

    POOLEDNOT POOLED
    For df use:

    Enter Sample Statistics

    Sample Sizes

    Sample Means

    Sample Standard Deviations

    Enter Sample Data

    RESULTS
    Confidence Interval

    Margin of Error

    Degrees of freedom, \(df\)

    Sample Information

    \(n\)

    \(\bar x\)

    \(s\)

    \(n_d\)

    \(\bar x_d\)

    \(s_d\)

    \(n_1\)

    \(\bar x_1\)

    \(s_1\)

    \(n_2\)

    \(\bar x_2\)

    \(s_2\)