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 1.
(ii. The standard deviation for nylon carpet is 4.64 cents
(iii) The range for nylon carpet is $0.12 or 12 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 1.
(ii. The standard deviation for nylon carpet is 4.64 cents
(iii) The range for nylon carpet is $0.12 or 12 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 false as the range for laminate flooring is actually 3 (from 8.66 to 11.66). 
(ii) is a correct statement as the given data has been used to calculate the standard deviation for nylon carpet. 
(iii) is a correct statement as the range for nylon carpet is 0.12 or 12 cents (from 7.28 to 7.40). Therefore, (ii) and (iii) are correct statements, but not (i), making option D the correct answer.

A Sample of Five Flooring Installers, Each Carrying Three Types