## Q-QUIZ JULY 2019

### Basics of technical statistics

Q-DAS tests your knowledge of technical statistics. Can you cope with our questions?

1. What is the quintessence of Taguchi’s loss function?

- You experience a loss when you try to reach a target value.
- The more your product specification deviates from the target value, the less the loss of quality.
- You experience a loss of quality the moment your product specification deviates from the target value.

2. Which statistic describes the number with the highest frequency in a sample?

- Mode
- Median
- Variance

3. Which pair of parameters describes the normal distribution model?

- Expectation µ and standard deviation σ
- Range R and median
- Maximum value and inflection point

4. Which series includes nominally scaled values?

- 30°C, 40°C
- Table, chair, picture frame
- Grade 1, grade 2

5. The values of a sample show several peaks in a histogram which shows that…

- the samples of several populations are mixed (e.g. data from different cavities, batches, etc.).
- the sample values were subject to random influences.
- the sample includes several outliers.

6. In order to conduct a statistical procedure, you formulate a null and an alternative hypothesis. The statistical procedure accepts or rejects…

- the null hypothesis.
- the alternative hypothesis.
- the null and alternative hypothesis.

7. Which quality control chart allows for minor systematic deviations of the distribution of characteristics?

- Shewhart control chart for standard deviations
- Shewhart median chart
- Acceptance chart for averages

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