The nurse researcher opts to use interval-level data. The researcher's primary concern will be what?
a. Categories must be mutually exclusive.
b. Intervals between data categories must be equal.
c. The rank of zero (0) represents the absence of the measured variable.
d. Variance between assigned categories is qualitative rather than quantitative.
ANS: B
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A This response is true for all levels of data: nominal, ordinal, interval, ratio.
B This is the defining characteristic of interval measurement.
C The zero does not represent the total absence of a variable in interval-level data.
D This response does not describe interval-level data.
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