Math

Confidence Interval Calculator

Confidence intervals for a mean (t or z) or a proportion (Wald and Wilson) at 80–99.9% confidence – margin of error, critical value and every step shown.

get/api/calc/confidence-interval-calculator

Request

  • Base URL: https://calcbright.com
  • URL: https://calcbright.com/api/calc/confidence-interval-calculator
  • Auth: none declared

Query parameters

type'mean-t' | 'mean-z' | 'prop'

Interval for

conf'80' | '85' | '90' | '95' | '98' | '99' | '99.9'

Confidence level

meannumber

Sample mean (x̄)

sdnumber

Sample SD (s)

xnumber

Successes (x)

nnumber

Sample size (n)

Response

Calculation result

okboolean
toolstring
namestring
urlstring

Open this link to see the full calculation

inputsobject
summarystring

Plain-text answer

detailsstring
resultobject
errorsobject

Changes

No recorded changes to this operation across all 1 revision of this API.