Question

Question 1. Classify the attributes from the following aspects: (1) binary, discrete, or continuous. (2) qualitative or quantitative. (3) nominal, ordinal, interval, or ratio. Example: Age in years. Answer: Discrete, quantitative, ratio. a. Weight in kg. b. ISBN of a book c. Letter grades: A, B, C, D, F d. Blood type of patient: Type A, Type B, Type O, Type AB, etc.

Answer 1

1.

Weight in Kg

Weight is a discrete quantity. Weight can be 20 kg, 30 kg etc

Weight is quantitative because we mean quantify it with some number

Weight is ratio because order and absolute zero in weights are defined.

2.

ISBN of a book

ISBN is a discrete because each book will get an ISBN from the domain of all possible ISBNs

ISBN is qualitative  because ISBN doesn't quantify anything.

ISBN is nominal because it is used only for labelling.

3.

Letter Grades : A,B,C,D,F

Grades are discrete because we can choose from 5 possible grades

Grades are qualitative because they don't quantify anything.

Grades are ordinal because they give an ordering. Like A is the best grade and F is the worst grade.

4.

Blood type of patient: Type A, Type B, Type O, Type AB, etc.

Blood types are discrete because their domain is discrete.

Blood types are qualitative because again they don't quantify anything.

Blood Types are nominal because they are just labels for various types of blood.

Answer 2

a. Weight in Kg:- continuous,quantitative, ratio

b. ISBN of book :-discrete,qualitative, nominal

ISBN numbers do have some order information so it could be ordinal if you use that information.

c. Letter grades :A,B,C,D,F :- discrete, quantitative, ordinal

grades of students describe the quality of the students hence it can be ordered. And is classified as ordinal data.

d. Blood type of patient Type A,Type B, Type O, Type AB etc ;-Continuous,qualitative,ordinal

Blood group is used to categorize the blood of the patient.