Understanding Data · Class 12 · CBSE · Science Computer Science
A school records the following attributes for each student: roll number, date of birth, height in centimetres, number of siblings, blood group, and p…
Practice question from Understanding Data (Class 12 · CBSE · Science Computer Science), with the correct answer and a step-by-step solution.
hard · MCQ · Q-1C7651
A school records the following attributes for each student: roll number, date of birth, height in centimetres, number of siblings, blood group, and performance level (Poor, Average, Good, Excellent). Which classification is correct?
- A.Roll number is continuous, height is nominal, number of siblings is ordinal, and performance level is discrete.
- B.Roll number is nominal, height is continuous, number of siblings is discrete, and performance level is ordinal.Correct answer
- C.Roll number is ordinal, height is discrete, number of siblings is continuous, and performance level is nominal.
- D.Roll number is discrete, height is ordinal, number of siblings is nominal, and performance level is continuous.
Solution
A roll number is an identifier, so it is nominal rather than a measurable quantity. Height can take decimal values and is continuous, the number of siblings is a count and is discrete, and performance levels have a meaningful order, making them ordinal.
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