A study is conducted to measure the effect of specific nursing interventions on the oxygen saturation of infants. Oxygen saturation is an example of what level of measurement?
1. Nominal scale.
2. Interval scale.
3. Ratio scale.
4. Ordinal scale.
3
Rationale 1: Data measured by a quantitative difference between categories that are mutually exclusive and mutually exhaustive is nominal level data.
Rationale 2: Interval level of measurement concerns data that not only can be placed into categories and ranked, but also requires that the distance between the ranks can be specified.
Rationale 3: Ratio scale of measurement is the highest form of measurement. Categories are mutually exclusive, mutually exhaustive, can be rank ordered, have equally spaced intervals, and have an absolute zero point. Oxygen saturation levels meet each of the preceding characteristics.
Rationale 4: Data that can be rank ordered as well as placed into categories are considered to be at the ordinal level of measurement.
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