信賴區間計算器

輸入計算

Sample Mean:

Standard Deviation:

Sample Size:

Confidence Level: 80% 85% 90% 95% 98% 99% 99.5% 99.9%

计算 重設

結果

95% Confidence Interval

9.3054 to 11.0946

Margin of Error: ±0.8946

Standard Error

0.4564

Z-Score

1.96

Mean

10.2

Sample Size

30

Std Dev

2.5