Assertion (A) : Temperature measurement on a Centigrade scale is an example of interval scale.
Reason (R) : In an interval scale, the order of values is important and significant, but the difference between the categories is not really known.
Assertion (A) Analysis: Centigrade Temperature as Interval Scale
The statement asserts that temperature measurement on a Centigrade scale is an example of an interval scale.
- Order: Centigrade scale has a meaningful order (e.g., 20°C is warmer than 10°C).
- Equal Intervals: The difference between degrees Celsius is constant and meaningful. The interval between 10°C and 20°C is the same as between 30°C and 40°C (both are 10°C).
- True Zero: The Centigrade scale has an arbitrary zero point (freezing point of water, 0°C), not a true absence of temperature.
These characteristics align with the definition of an interval scale. Therefore, Assertion (A) is correct.
Reason (R) Analysis: Interval Scale Properties
The reason states that in an interval scale, "the order of values is important and significant, but the difference between the categories is not really known."
- The first part, "the order of values is important and significant," is true for interval scales.
- However, the second part, "the difference between the categories is not really known," is incorrect. A defining feature of interval scales is precisely that the differences between values are known and equal (e.g., the 10°C difference).
Therefore, Reason (R) is incorrect.
Conclusion
Based on the analysis, Assertion (A) is correct, and Reason (R) is incorrect.
Thus, the correct option is that (A) is correct, but (R) is incorrect.
Important Questions from Types of Measurement Scale - Teaching
- The sequential steps of constructing Thurstone Equal Appearing Interval attitude scale are -
A. Collection and Editing of items
B. Calculating Scale and Q values
C. Finalization of items
D. Sorting items on different continuum
E. Administration
Choose the correct answer from the options given below - Which one of the following semantic dimensions are measured by the "semantic differential scale" ?
- Which of the following variables can be classified only under the nominal category ?
(i) Eye colour
(ii) Military rank
(iii) Type of cheese
(iv) Scores in a test
(v) Political party affiliations
Choose the correct answer from the code given below : - Match List I with List II
List I List II A. Nominal scale I. Kendall-Tau B. Ordinal scale II. Mean C. Interval scale III. True zero D. Ratio scale IV. Mode
Choose the correct answer from the options given below: Which of the following is an attitude measure that places a single adjective in the centre of an even number of numerical values?
