关于本计算器
Z-score and percentile from a value, mean and standard deviation using the standard normal distribution.
Z分数计算器
由数值均值求Z分数与百分位。
输入计算参数
计算结果摘要
Z 分数0.5
百分位69.14625435%
|X − μ|5
常见问题
Z-score formula?
z = (X − μ) / σ: how many deviations the value sits from the mean.
What is the percentile?
The normal CDF at z times 100 — share of the population below X.
Negative z?
Simply means below average; percentile drops under 50 accordingly.