Measuring and data collection

Choosing a statistical test

Minimum sample size

Not normally distributed

Statistical process control (SPC)

How to conduct a DOE

Setting up a Response surface test (RSM)

For commercial use

75 EURO

- Present the data graphical
- If data is significant different
- If data is has the same shape distribution

- Monitor to production process
- Behavior over time

Correlation Graph To find correlations

There is a correlation as the value on the X-axle is having influence on the Y-axle

Histogram shape of distribution and position of your data

Example resistance of a light-bulb | |

• Length of the wire | |

• Material of the wire | |

• Diameter of the wire | |

• Internal connection of the wire | |

• External connection of the bulb |

Adding up all these distributions will create normally distributed data due to the Central limit theorem.

The summarizing independent distributions results in a approximately normally distributed data. Even if the independent distribution are not normally distributed.

• Check if data is within tolerance | |

• Determine if there is a significant difference in Mean or Variation | |

• If there is a correlation between to data sets |