Ch. 1 Quiz

A researcher uses an anonymous survey to investigate the television-viewing habits of 100 American adolescents. The researcher plans to make an inference about the television-viewing habits of all American adolescents based on the results of the survey. The entire group of American adolescents is an example of a _____.

population

The value of (Σ X) ² for the scores 1, 5, and 2 is 64.

True

The goal for an experiment is to examine whether changes in one variable are responsible for causing changes in a second variable.

True

Students in an introductory art class are classified as art majors and non-art majors. Which scale of measurement is being used to classify the students?

nominal

Organizing a set of scores in a table or computing an average to summarize a data set is an example of using ______.

descriptive statistics

The University of Houston divided its employees into ten groups based on departments and sent a survey to 50 randomly selected employees from each of the ten groups to determine employee satisfaction with their current health benefits. What type of sample was taken in this example?

Stratified Random Sample

You are instructed to square each score and subtract four points from the sum of these squared scores. How would this set of instructions be expressed in summation notation?

ΣX ² – 4

Participants reporting the number of cell phones they have owned in their lifetime would be an example of a discrete variable.

True

Harris County randomly surveyed 300 University of Houston students who live in the Third Ward to determine how all residents of the Third Ward felt about Third Ward crime rates and safety. Based on this description, please identify the correct term for the type of bias/effect being defined.

Selection Bias

Barbara is a psychologist who measures relationship satisfaction among couples by observing non-verbal behavior (e.g., smiling, mimicking partner actions). In this example, non-verbal behavior is an example of a(n) _____.

operational definition