Confidence Interval Bounds
Calculator

Inputs

Interval lower bound
95.8

Results

Interval lower bound
95.8
Interval upper bound
104.2
Margin of error
4.2

Statistical results

Interval lower bound95.8
Interval upper bound104.2
Margin of error4.2

formula-map diagram

Interval lower bound
95.8
Interval upper bound
104.2
Margin of error
4.2

Statistical relationship

Formula

CI = x̄ ± z × (σ / √n)

= 95.8

Note

This is a simplified model: it applies the displayed standard formula to the summary values you entered and assumes their underlying conditions (independence, normality, correct sampling) hold. It does not analyse a real data set. Check the assumptions before relying on the result.

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