# system.kanoa.quality.spc.rule1(valueList, mean, sigma)

Rule 1: One point is more than 3 standard deviations from the mean (outlier)

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### Parameters
**valueList** `List of Float values`: A list of values<br />
**mean** `Float`: Mean value of the valueList<br />
**sigma** `Float`: Standard deviation of the valueList values<br />

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### Returns
**ruleViolation** `Boolean`<br />
**resultSet** `List of Boolean values` ruleViolation for each value in the valueList<br />

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### Example
```python
valueList = [99, 101, 98, 102, 100, 118]
mean = 100
sigma = 5
result = system.kanoa.quality.spc.rule1(valueList, mean, sigma)
```