1. Statistical Models or Quality Control Improvement
Chapter 2
Statistical Models or Quality Control Improvement

2. Stem-and-Leaf Display
Easy to find percentiles of the data; see page 43

3. Plot of Data in Time Order
Marginal plot produced by MINITAB
Also called a run chart

4. Histograms – Useful for large data sets
Group values of the variable into bins, then count the number of observations that fall into each bin
Plot frequency (or relative frequency) versus the values of the variable

5. Histogram for discrete data

7. Numerical Summary of Data

10. The Box Plot (or Box-and-Whisker Plot)

11. Comparative Box Plots

16. The Hypergeometric Distribution

18. The Binomial Distribution
Basis is in Bernoulli trials
The random variable x is the number of successes out of n Bernoulli trials with constant probability of success p on each trial

22. Frequently used as a model for count data
The Poisson Distribution
Frequently used as a model for count data

23. The Normal Distribution

27. Original normal distribution
Standard normal distribution