Question

the following data represents the influences of teens on music choices in percentages:

radio - 38
friends - 30
television - 20
parents - 6
concerts - 4
magazines - 2

find the interquartile range of the data.

12
26

Explanation:

Order the data set

Using the Ordering Numbers knowledge point

$$ 2, 4, 6, 20, 30, 38 $$

Find the quartiles of the data set

Using the Quartiles of Data knowledge point

$$
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$$

Calculate the interquartile range

Using the Interquartile Range knowledge point

$$ \text{IQR} = Q_3 - Q_1 = 30 - 4 = 26 $$

Answer:

• 12
• 26 (Correct answer)