Question

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 is the IQR?

Answer 1

Answer: $454

Explanation:IQR - Interquartile range. It is a statistical dispersion which is equal to the diff between the 75th and 25th percentile. It can also be described as the diff between the upper and lower percentile.

IQR=Q3-Q1

From the range of figures listed below: 1,127, 1,482, 2,995, 3,009, 3,250, 3,250, 3,445, 3,449, 4,000, 6,120

From the list the Q1 =2,995, while the Q3 = 3,449.

IQR = Q3-Q1

= 3,449 - 2,995

= 454