Chapter 1 Flashcards
Observational Study
Investigator’s role is passive
Experimental Study
Investigator’s role is active
Enumerative Study
A particular, well-defined, finite group of objects under study
Analytical Study
A study in which the data collected is hoped to be representative of the system
Qualitative Data
Non-numerical characteristics
Quantitative Data
Numerical characteristics
Univariate Data
Single characteristic of each sampled item is observed
Multivariate Data
Observations are mad on more than one characteristic of each sampled item
Bivariate Data
Observations are made on two characteristics of each sampled item
Repeated Measures Data
Multivariate data consisting of the same characteristic observed at multiple times or with multiple methods
Paired Data
Bivariate data consisting of the same characteristic taken at different times or with different methods
Complete Factorial Study
Several process variables are identified and data is collected at each possible combination
Factors
Process variables
Levels
Settings of process variables
Fractional Factorial Study
Data are collected for only some of the combinations that would make up a full factorial study
Issues concerning measurement
Validity -> Precision -> Accuracy
Valid Data
Data that usefully or appropriately represents the feature of interest
Precise Data
Data with small variation in repeated measurement
Accurate Data
Data that, on average, produces true or correct values of the quantity being measured
Mathematical Model
Description or summarization of features of a real-world system in terms of numbers and equations
Probability
Mathematical theory intended to describe situations that involve chance
