Home
Privacy
About us
Terms of Service
Search for:
Confidence Interval Calculator
Sample Mean (x̄):
Standard Deviation (σ or s):
Sample Size (n):
Confidence Level:
90%
95%
99%
Custom
Population Standard Deviation:
Known (σ)
Unknown (s)
Calculate
Reset
Results
Confidence Interval:
Margin of Error:
Standard Error:
Critical Value (z or t):
