Exam 1: Introduction

The variable "number of children" uses the attributes 0, 1, 2, 3 ... (continuing as high as is needed). This variable is

A researcher wants to measure the variable "frequency of seat belt use" at the ordinal level. Provide a set of attributes for the variable.

The categories of a variable have ONLY the following properties: the categories are different and the categories have rank order. What level of measurement does this variable have?

Is the variable "percent of a population that is female" continuous or discrete?

A researcher hypothesizes that a person's political attitudes are influenced by his or her parents' political attitudes. What is the independent variable in this hypothesis?

A student complains that college tests don't really measure how much you know or how well you think. Teachers claim they do but the student says they really measure how fast you can work. The student is claiming college tests lack

What is the difference between reliability and validity?

A researcher wants to measure the variable "age at last birthday" at the interval/ratio level. Provide a complete set of attributes for the variable.

You are interested in the effect of education on income. What are some other possible influences on income that you would want to control for?

For the following pair of variables, which is the more likely DEPENDENT variable: occupation and race?

To show that a causal relationship exists, what three things are required?

Is the variable "number of college courses passed" continuous or discrete?

What are the differences between independent, dependent, and control variables?

Is the variable "number of times a person has been married" continuous or discrete?

Is the variable "percent of time a married person spends with his or her spouse" continuous or discrete?

The variable "amount of control a child has over what he or she watches on TV" (categories: no control, slight control, moderate control, complete control) has what level of measurement?

For the following pair of variables, which is the more likely INDEPENDENT variable: current residence and place of birth?

The variable "frequency of late-arrival at class" (attributes: never, occasionally, usually, always) has what level of measurement?

You are examining a variable's attributes. They represent all the possibilities without overlapping one another; they have an inherent order; and they represent a numeric scale. Furthermore, the attributes are equally wide. What level of measurement does the variable have?

What is the difference between a census and a sample?