Z-Score Calculator 📊

About Z-Score

Calculates how many standard deviations a data point is from the mean.

Features

• Instant Z-Score calculation
• Calculates one-tailed probability (P < x)
• Clear statistical results
• Percentage conversion

How to Use

1. Enter Raw Score, Mean, and Standard Deviation.
2. View calculated Z-Score.
3. Interpret probability and percentile.

Formulas

z = (x - μ) / σ

Where x is raw score, μ is mean, and σ is standard deviation.

Interpretation

• 0 = Exactly at the mean
• Positive = Above the mean
• Negative = Below the mean
• Probability represents the area under the curve to the left