# system.kanoa.quality.spc.rule8(valueList, mean, sigma)

Rule 8: Eight points in a row exist with none within 1 standard deviation of the mean and the points are in both directions from the mean (bimodal, 2 or more factors in data set)

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### Parameters
**valueList** `list[float]`: 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 = [92, 108, 91, 109, 93, 107, 94, 106]
mean = 100
sigma = 5
result = system.kanoa.quality.spc.rule8(valueList, mean, sigma)
```