SQ01

Answers to these study questions are due at the beginning of the class 08/24

Text

1. What kinds of methods led to the production of high-quality products in the 1980s?

  Statistical methods

2. Statistical methods allow engineers to make decisions despite ___________ and _________ in the data.

  uncertainty, variation

3. In Example 1.3, how are the plotted values (e.g. the point at 20% and almost 1000) determined?

  They are the means of the four Coating/Humidity combination conditions.

 

4. The mean of a sample, , is an estimate of ___________________________.

  the population mean

 

Notes

5. What is the "commonsense" idea of probability?

  Relative frequency

6. We have a bag with equal numbers of black and white marbles. We think about drawing a random sample, with replacement , of 20 marbles. We think it most likely that 10 would be black and 10 white in our sample. In statistics, this is known as _______________.

  Expectation

7. We have a bag with 20 marbles, some red and some green, but unknown just what proportion. We draw a random sample, with replacement, of 10 marbles. Three are red and seven green. We make a "best guess" that there are 6 red and 14 green marbles in the bag. This is a commonsense version of the statistical procedure called _______________.

  Estimation

8. The mean of a set of measures is analogous to what physical entity?

  Center of gravity

9. The variance of a set of measures is analogous to what physical entity?

  Moment of inertia about the mean (center of gravity)

10. What population quantity does the sample variance estimate?

  variance

 

11. What two disciplines is statistical theory based on?

  Probability theory and decision theory