الرياضيات
Confidence Interval Calculator
Calculate the margin of error and confidence interval from a sample mean and standard deviation.
كيفية الاستخدام
- Enter your Sample Mean (the average of your data).
- Enter the Sample Size (how many data points you collected).
- Enter the Standard Deviation of your sample.
- Select your desired Confidence Level (95% is standard).
- The calculator determines the Margin of Error and the lower/upper bounds of where the true population mean likely lies.
الصيغة
Confidence Interval Formula:
CI = x̄ ± Z × (s / √n)
Where:
x̄ = Sample mean
Z = Z-score matching the confidence level
s = Standard deviation
n = Sample size
CI = x̄ ± Z × (s / √n)
Where:
x̄ = Sample mean
Z = Z-score matching the confidence level
s = Standard deviation
n = Sample size
A Confidence Interval Calculator helps statisticians find a range of values that likely contains the true population mean. By combining the sample mean, standard deviation, and sample size, it generates a Margin of Error, giving context to the accuracy of sample data.