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27 September, 17:46

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?

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  1. 27 September, 17:59
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    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
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