A nurse measures pulse oximetry levels of of a patient at rest and during activity. This...
A nurse measures pulse oximetry levels of of a patient at rest and during activity. This is an example of what level of measurement? A. Ordinal B. Nominal C. Ratio D. Interval
Homework Answers
Pulse oximetry is a way to find how much Oxygen our blood is carrying.
Let's define the four kind of measurements :
Ordinal Measurement : it is ranking kind of data. For example how well is your Japanese ? 1. Very good 2. Good 3. Not good 4..poor
But the question is quantitative measurement..so not ordinal..
Nominal is also qualitative.
Now between ratio and interval how do we choose ?
Interval data does not have a true zero and also values are equidistant..but for ratio values will not be equidistant.
In our case we can have a zero which is meaningful . That is , we can have the scenario where the difference between at rest and during activity will be zero. Also the values will not be equidistant..
So in our case the answer is Ratio..
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