A z-score states how many standard deviations a value lies above or below the mean.
What Is Z-Score?
A z-score states how many standard deviations a value lies above or below the mean.
Examples of Z-Score
1
If x=70, μ=60, σ=5, then z=2.Formula and Key Points
Formula / rule
z=(x−μ)/σ
- Know the definition and standard notation for Z-Score.
- Be able to recognise or compute z-score in a small example.
- Connect the concept to nearby topics in the same subject before using it in larger CSE problems.
Why This Matters in Computer Science
Used in data analysis, machine-learning evaluation, experiments, monitoring and performance measurement.
Related Math Terms
Z-Score: Frequently Asked Questions
What is Z-Score?
A z-score states how many standard deviations a value lies above or below the mean.
Why is Z-Score useful in computer science?
Used in data analysis, machine-learning evaluation, experiments, monitoring and performance measurement.