Chapter 1, Lesson 9, Statistical Modeling Purpose

Why do different types of statistical models exist?

because there are many different types of variables and the models provide ways to analyze them

Variables are collected in the form of data. What are the two major forms of data?

categorical and quantitative

Jim is studying how differences in the screen color of electronic devices make an impact on eye strain experienced by the user. In these experiments, which is the response variable and which is the explanatory variable.

the response variable is eye strain; the explanatory variable is screen color

dependent variable

which is a condition or piece of data in an experiment that is controlled or influenced by an outside factor, most often the independent variable.

correlation

which is the relationship between two variables or sets of data. A correlation test is one type of statistical model.

The _____ is a condition or piece of data in an experiment that is controlled or influenced by an outside factor, most often the independent variable.

dependent variable

response variable

is the observed variable, or variable in question.

Sheila is a baker experimenting with a cake recipe. Specifically, she is monitoring how changes in the volume of cream affect the moistness of the cake. What kind of variable is the volume of cream, and why?

it is an independent variable because it is a condition in the experiment that can be changed.

statistical model

is a combination of inferences based on collected data and population understanding used to predict information in an idealized form.

explanatory variable

is a variable or set of variables that can influence the response variable.