LC Chapter 1 & 6

A variable that places an individual into one of several groups is called a/an _________ variable.

categorical

Members of a health club were asked which classes they took at the club (Zumba, Step, P90, etc.). Why would it not be correct to display this data in a pie chart? We don't know all the classes that the club teaches, so these may be left off the pie chart. Not all the members take a class at the club so not all members would be clearly represented in the pie chart. Some members may take more than one kind of class at the club, so those taking more than one class could create a potential percentage of more than 100. We don't have the actual data.

Some members may take more than one kind of class at the club, so those taking more than one class could create a potential percentage of more than 100.

Which of the following is a true statement about histograms and bar graphs? -The horizontal axes of histograms and bar graphs identify the items being compared, and may not have a unit of measurement. -The horizontal axis of a bar graph is marked in the units of measurement of the variable, but the horizontal axis of a histogram identifies the items being compared, and may not have a unit of measurement. -The horizontal axes of histograms and bar graphs are always marked in the units of measurement of the variable. -The horizontal axis of a histogram is marked in the units of measurement of the variable, but the horizontal axis of a bar graph identifies the items being compared, and may not have a unit of measurement.

The horizontal axis of a histogram is marked in the units of measurement of the variable, but the horizontal axis of a bar graph identifies the items being compared, and may not have a unit of measurement.

A quantitative variable that can take any real numerical value within an interval is called a _______ variable.

continuous→ A continuous variable can take any real numerical value within an interval. An example of this is the length of a flower stem.

A researcher is studying the eye color of mice. What type of variable is eye color in mice? continuous nominal discrete ordinal

nominal

Participants in a research study are asked to rate their energy level using the responses 0 to 5, with "0" indicating "very low energy" and "5" indicating "very high energy". What type of variable are these responses? Answer choices: nominal ordinal discrete continuous

ordinal → Although the participants give their answers as numbers, the rankings really represent the category they place themselves in. This is a categorical variable. The responses can be ordered from smallest to largest, so this is an ordinal variable.