A sample of five flooring installers, each carrying three types of flooring, was taken and the price per square metre (to the nearest cent) was recorded for each type of flooring, as shown in the table below. (i) The range for laminate flooring is 0 or none.
(ii. The variance for laminate flooring is 0.
(iii) The range for nylon carpet is $0.15 or 15 cents.
A) (i), (ii) and (iii) are all correct statements
B) (i) and (ii) are correct statements but not (iii).
C) (i) and (iii) are correct statements but not (ii).
D) (ii) and (iii) are correct statements, but not (i).
E) (i), (ii) and (iii) are all false statements.

Question

A sample of five flooring installers, each carrying three types of flooring, was taken and the price per square metre (to the nearest cent) was recorded for each type of flooring, as shown in the table below.  (i) The range for laminate flooring is 0 or none.
(ii. The variance for laminate flooring is 0.
(iii) The range for nylon carpet is $0.15 or 15 cents.
A) (i), (ii) and (iii) are all correct statements 
B) (i) and (ii) are correct statements but not (iii). 
C) (i) and (iii) are correct statements but not (ii). 
D) (ii) and (iii) are correct statements, but not (i). 
E) (i), (ii) and (iii) are all false statements.

Quizplus · Accepted Answer

(i) is true because the range for laminate flooring is 0 as there is only one price recorded for it.
(ii) is true because the variance for laminate flooring is 0 as there is only one price recorded for it.
(iii) is false because the range for nylon carpet is actually $0.25, which is the difference between the highest and lowest prices recorded for it in the table. Therefore, only (i) and (ii) are correct statements, making choice (B) the correct answer.

A Sample of Five Flooring Installers, Each Carrying Three Types