the heights (in centimeters) of a sample of a species of a plant 30 days after s
ID: 3270903 • Letter: T
Question
the heights (in centimeters) of a sample of a species of a plant 30 days after sprouting are shown below. 23.7 , 24.9 , 26.9, 21.5, 23.8, 24.8, 23.3,24.7 determine the level of measurement of the data set? A. Interval. The data can be ordered and differences between data entries are meaningful, but a zero entry isbut a zero entry is not an inherent zero.not an inherent zero. B. Nominal. No mathematical computations can be made. C.Ratio. The data can be ordered and differences between data entries are meaningful, and a zero entry isand a zero entry is an inherent zero.an inherent zero. D. Ordinal. The data can be arranged in order, or ranked, but differences between data entries are not meaningful.
Explanation / Answer
The heights of a sample of a species of plant 30 days after sprouting can be classified into categories (for example, below 24 cm height to be declared X category and above 24 cm to be declared Y category). This enables the variable to be nominal. Again, the variable alongwith classification is entitled to ranking of categories with respect to each other (for example, 20-22, 23-25 and so on). Thus, the variable is measured at ordinal level. Finally, the differences between data entries are meaningful and mathematical operations can be performed on them. Thus, the variable is measured at interval level. Variable measured at interval level has measurement procedure of both nominal and ordinal level. Since, there is no zero value, ratio level of measurement is not possible. Thus, correct answer is A>Interval.
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