Confidence Interval Calculator for Mean
Easily calculate the confidence interval for the population mean. Input sample mean, standard deviation, sample size, and confidence level to find the range.
Results
Lower Bound:
Upper Bound:
Visual Representation
Understanding Confidence Intervals
A confidence interval is a range of values that's likely to include a population parameter with a certain degree of confidence. It's used to estimate the true value of a population mean based on sample data.
For example, a 95% confidence interval means that if we were to take many samples and calculate a confidence interval for each sample, about 95% of these intervals would contain the true population mean.
To use this calculator, enter:
- Sample Mean: The average value from your sample data.
- Sample Standard Deviation: A measure of the spread of your sample data.
- Sample Size: The number of data points in your sample.
- Confidence Level: The desired confidence level, typically 90%, 95%, or 99%.
The calculator will then provide the lower and upper bounds of the confidence interval, giving you a range within which the true population mean is likely to fall.