Confidence Interval Calculator
To get the result, fill out the calculator form and press the Calculate button.
What is the Confidence Interval ?
A confidence interval, in statistics, refers to the probability that a population parameter will fall between a set of values for a certain proportion of times.
Analysts often use confidence intervals that contain either 95% or 99% of expected observations. Thus, if a point estimate is generated from a statistical model of 10.00 with a 95% confidence interval of 9.50 - 10.50, it can be inferred that there is a 95% probability that the true value falls within that range.
Confidence Interval formula
- CI denotes to sample Confidence Interval
- z is the confidence level value
- s is the sample standard deviation
- x̄ is the mean value of the sample
- n is the sample size
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