Answered

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{8, 15, 9, 18, 9, 17, 22, 10, 11, 9, 13}
What is the interquartile range of the data set?

Sagot :

Answer:

IQR = 8

Step-by-step explanation:

The interquartile range (IQR) is the difference between the upper quartile Q₃ and the lower quartile Q₁

We require the data arranged in ascending order and to find the median Q₂

The median is the middle value of the data arranged in ascending order.

8, 9, 9, 9, 10, 11, 13, 15, 17, 18, 22

                      ↑ Q₂

The upper quartile is the middle value of the data to the right of the median

13, 15, 17, 18, 22

           ↑ Q₃

The lower quartile is the middle value of the data to the left of the median

8, 9, 9, 9, 10    

        ↑ Q₁

IQR = Q₃ - Q₁ = 17 - 9 = 8

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