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Confidence Limits for Mean Calculator

Calculate the confidence interval of mean with the given inputs of sample size, mean, standard deviation and chosen confidence level.

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Confidence Limits for Mean Calculation

Confidence Level = %
Sample Size (n) =
Mean (x) =
Standard Deviation (σ) =  

 

CI for Mean = < µ <

 
   
  
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Formula Used
If (n>=30),
CI = x ± Zα/2 × (σ/√n)

If (n<30),
CI = x ± tα/2 × (σ/√n)

Where,
    x = Mean
    σ = Standard Deviation
    α = 1 - (Confidence Level/100)
    Zα/2 = Z-table value
    tα/2 = t-table value
    CI = Confidence Interval

Online calculation of Confidence Limits for Mean is made easier.