Free Standard Normal Distribution Calculator - find the probability of Z using standard normal distribution step-by-step

You can use this p-value calculator to calculate the right-tailed, left-tailed, or two-tailed p-values for a given z-score. It also generates a normal curve and shades in the area that represents …

What is a Z Score? A Z Score, also called as the Standard Score, is a measurement of how many standard deviations below or above the population mean a raw score is. Meaning in simple …

Use this P to Z calculator to easily convert P-values to Z-scores (standard scores) and see if a result is statistically significant. Supports one-tailed and two-tailed p-values. Detailed …

Diagrammatically, the probability of Z less than ' a ' being Φ (a), as determined from the standard normal distribution table, is shown below: P (Z < –a) As explained above, the standard normal …

2025年1月12日 · Z值与P值：Z值的大小反映了样本与总体均值的偏离程度，Z值越大（绝对值），对应的P值越小，意味着样本数据与原假设的差异越显著，提供拒绝原假设的证据越强。 …

Z-score calculator, p-value from z-table, left tail, right tail, two tail, formulas, work with steps, step by step calculation, real world and practice problems to learn how to find standard score for …

2019年6月14日 · P值代表，在假设原假设（HO)正确时，出现现状或更差的情况的概率. 设置一个想要推翻的结论的对立面的null hypothesis，而P值就是假设null hypothesis成立的情况下，计 …

2024年9月8日 · The p-value calculator can help you find the p-value and evaluate how compatible your data is with the null hypothesis.

Calculator to compute p-value from Z-score or Z-score from p-value for a normal distribution. It also provides a diagram illustrating the area of the p-values.