Exam 2: Organizing Data, Variables and Measurement

Discrete data measured on an ordinal, interval, or ratio scale are best graphed with a:

A categorical variable is a _____ variable, and a variable where the scores represent a change in quantity is a _____ variable.

Bar graphs are used with _____ data.

If I collected data on the frequency of various weights for people in a weight loss program, what type of graph should I use to organize the data?

If I collected data on the number of children per family in a particular neighborhood, what type of graph should I use to organize the data?

A graphical representation of a frequency distribution in which vertical bars are centered above each category along the x-axis and are separated from each other by a space is a _____, and a graphical representation of a frequency distribution in which vertical bars centered above scores on the x-axis touch each other is a _____.

A frequency distribution represents _____, and a frequency polygon represents _____.

Grouping the scores into intervals represents a _____, and listing the frequency of every score represents a _____.

Frequency distributions are used with _____ data.

If I collected data on the frequency of various ethnicities represented at a university, what type of graph should I use to organize the data?

In a _____, bars on the graph are separated from each other by a space, and in a _____, bars on the graph touch each other.

Explain when it is most appropriate to use a bar graph and a histogram.

Continuous data measured on an ordinal, interval, or ratio scale are best graphed with a: