In Problems 3–5, determine if the variable is qualitative or quantitative. If the variable is quantitative, determine if it is discrete or continuous. State the level of measurement of the variable.
The number of surface imperfections on a camera lens.

"In Problems 12–15, determine the level of measurement of each variable.

Marital status"

"In Problems 12–15, determine the level of measurement of each variable.

Number of siblings"

In your own words, define the four levels of measurement of a variable. Give an example of each.

"In Problems 3–5, determine if the variable is qualitative or quantitative. If the variable is quantitative, determine if it is discrete or continuous. State the level of measurement of the variable.

Video game rating system by the Entertainment Software Rating Board (EC, E, E10+, T, M, AO, RP)"

Putting It Together: Online Homework Keeping students engaged in the learning process greatly increases their chance of success in a course. Traditional lecture-based math instruction has given way to a more student-engaged approach where students interact with the teacher in class and receive immediate feedback to their responses. The teacher presence allows students, when incorrect in a response, to be guided through a solution and then immediately be given a similar problem to attempt. A researcher conducted a study to investigate whether an online homework system using an attempt—feedback— reattempt approach improved student learning over traditional pencil-and-paper homework. The online homework system was designed to increase student engagement outside class, something commonly missing in traditional pencil-and-paper assignments, ultimately leading to increased learning.The study was conducted using two first-semester calculus classes taught by the researcher in a single semester. One class was assigned traditional homework and the other was assigned online homework that used the attempt—feedback—reattempt approach. The summaries are based on data from the study.

f. What type of variable is letter grade? What level of measurement is letter grade? Do you think presenting the data in a table from A to F would be a better representation of the data than presenting it in a graph?

Name each level of measurement for which data can be qualitative.

Name each level of measurement for which data can be quantitative.

Determine the level of measurement of the data set. Explain your reasoning.

The lengths (in centimeters) of 22 Ford automobiles are listed. (Source: Automobiledimension.com)

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