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Confidence Interval Calculator

Calculate the confidence interval for a population mean given sample statistics. Supports 90%, 95%, and 99% confidence levels.

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Calculate confidence intervals for a population mean

Sample Mean (x̄) Std Deviation (s) Sample Size (n)

Confidence Interval

(95.84, 104.16)

Margin of Error

± 4.16

Standard Error

2.121

Z-Score

1.960

Upper & Lower

95.84 / 104.16