Question

2. Identify the unit on which each of the following variables is measured and classify the variable as qualitative or quantitative. For example, for the variable “the age of a person”, a person is a unit and the possible values of the variable are positive numbers representing possible ages. Since these ages are numbers on the number line this is a quantitative variable.

a) The number of children in a family;

b) The size of the memory (RAM) in a laptop computer (measured in GB);

c) The number of correct answers on a multiple choice exam;

d) The color of the front entrance door of a house;

e) The letter grade obtained by a student in a statistics class.

Answer 1

Ans:

a)The number of children in a family

Number of children in a family can be 0,1,2,3,4,.........

Quantitative variable

b)The size of the memory (RAM) in a laptop computer (measured in GB);

Size of memory(in GB) can be 1,2,3,4,5,..........

Quantitative variable

c)The number of correct answers on a multiple choice exam

number of correct answers can be 0,1,2,3,4,......

Quantitative variable

d)The color of the front entrance door of a house,

Color can be white,yellow,brown......etc.

Qualitative variable

e)The letter grade obtained by a student in a statistics class.

Grade can be A,B,C,D,F etc.

Qualitative variable