This calculator finds the standardized z-score for any raw value of X, a population mean, and a population standard deviation.
A z-score simply tells us how many standard deviations away from the mean a value X lies.
To find the z-score for any value of X, simply fill in the boxes below and then click the “Calculate” button.
Z Score Numerical Explanation:
Z score: (X – μ) / σ
Z score: (17 – 13.5) / 4 = 0.875
Z Score Visual Explanation:
The value 17 is located 0.875 standard deviations above the mean.