Measurement & Scaling

Interval scales are exactly like ratio scales, except that they have a true zero point.

• True

• False

• May be

The nominal scale of measurement classifies objects into mutually exclusive categories.

• True

• False

What is the difference between data measured on an interval scale and data measured on a ratio scale?

• A ratio scale has a true zero point, so zero on the scale corresponds to zero of the concept being measured.

• An interval scale has a true zero point, so zero on the scale corresponds to zero of the concept being measured.

• A ratio scale has equal intervals between the points on the scale, whereas an interval scale does not.

Your local police force wants to install cameras that can "catch" drivers who run red lights. They choose a busy intersection, install a test camera, and determine whether each car stops safely or "runs" the light. Choose the correct scale of measurement.

• Nominal.

• Ordinal.

• Interval.

• Ratio.

School administrators sponsor a study of bullying on elementary school playgrounds. Trained observers record the number of incidents of aggression that occur during consecutive 10-minute periods. Aggression is measured on which of the following scales of measurement?

• Ordinal.

• Ratio.

• Nominal.

• Interval.

In this Scale of Measurement numbers indicate the relative positions of the objects but not the magnitude of differences between them:

• Ordinal

• Interval

• Nominal

• Ratio

In this Scale of Measurement differences between objects can be compared; zero point is arbitrary:

• Nominal

• Ordinal

• Interval

• Ratio

In this Scale of Measurement Zero point is fixed; ratios of scale values can be computed:

• Ratio

• Ordinal

• Interval

• Nominal

A measurement scale with five response categories ranging from “strongly disagree” to “strongly agree”

• Non comparative scale

• Itemized rating scale

• Continuous rating scale

• Likert scale

This measurement scale has the respondents rate the objects by placing a mark at the appropriate position on a line:

• Non comparative scale

• Itemized rating scale

• Continuous rating scale

• Likert scale