Hazardous waste: Following is a list of the number of hazardous waste sites in a sample of states of the United States in a recent year. The list has been sorted into numerical order:
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Source: U.S. Environmental Protection Agency
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Part 1 of 4
(a) Find the first and third quartiles of these data.
The first quartile of these data is
The third quartile of these data is

Answer

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Answer

Final Answer: The first quartile of these data is $12.25$ and the third quartile of these data is $31.5$ .

Steps

Step 1 ：Sort the data in ascending order.

Step 2 ：Calculate the position of the first quartile using the formula: $Q 1 = (n + 1) * 0.25$ , where n is the number of data points.

Step 3 ：Calculate the position of the third quartile using the formula: $Q 3 = (n + 1) * 0.75$ .

Step 4 ：Find the values at the calculated positions for the first and third quartiles.

Step 5 ：Final Answer: The first quartile of these data is $12.25$ and the third quartile of these data is $31.5$ .