The company financial officer was interested in the average cost of PCs that had been purchased in the past six months. She took a random sample of the price of 10 computers, with the following results. $3,250, $1,127, $2,995, $3,250, $3,445, $3,449, $1,482, $6,120, $3,009, $4,000
What are the lower and upper limits of a box-and-whiskers display of this data?
A) 2541, 3903
B) 2768, 3676
C) 2087, 4357
D) 2314, 4130
E) 1633, 2087

Question

Quizplus · Accepted Answer

Lower limit = Q₁ − 1.5 IQR = 2995 − (1.5 × 454) = 2314 Upper limit = Q₃ + 1.5 IQR = 3449 + (1.5 × 454) = 4130

The Company Financial Officer Was Interested in the Average Cost