bmel:zScore¶
Category: Math · Returns: bmel:number
bmel:zScore(value: bmel:number, mean: bmel:number, stddev: bmel:number)
Description¶
Returns the z-score (standard score) of a value: (value - mean) / stddev. Measures how many standard deviations a value lies from the mean. Returns null when stddev is zero.
Arguments¶
| Parameter | Type | Required | Description |
|---|---|---|---|
value | bmel:number | ✅ | The value to standardize. |
mean | bmel:number | ✅ | The mean of the reference distribution. |
stddev | bmel:number | ✅ | The standard deviation of the reference distribution. |
Example¶
bmel:zScore({metric:Response Payload}.$.latency, 320.0, 45.0)