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Formula Reference / Formula Functions / Statistical Functions / CONFIDENCE.T
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    CONFIDENCE.T
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    This function returns the confidence interval for a population mean.

    Syntax

    CONFIDENCE.T(alpha,stdev,size)

    Arguments

    This function has these arguments:

    Argument Description
    alpha Alpha, significance level used in calculating confidence level, where confidence level is 100 times (1-alpha)%
    stdev Population standard deviation for the range
    size Number representing the size of the sample; if not an integer, the number is truncated

    Remarks

    The function uses a Student's t distribution. If size = 1, the function returns a #DIV/0! error value. If any argument is nonnumeric, the function returns the #VALUE! error value.

    Data Types

    Accepts numeric data for all arguments. Returns numeric data.

    Examples

    CONFIDENCE.T(0.5,B4,D5)

    CONFIDENCE.T(0.5,R4C2,R5C4)

    CONFIDENCE.T(0.05,3.5,150) gives the result 0.5646928012079743