Find the first and third quartiles for each data set.
$1388, 78, 85, 74, 66, 82, 68$
149,2

Answer

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Answer

4. Determine the third quartile (Q3): $Q 3 = \frac{82 + 85}{2} = 83.5$

Steps

Step 1 ：1. Organize the data set: $66, 68, 74, 78, 82, 85, 1388$

Step 2 ：2. Find the median (Q2): $Q 2 = 78$

Step 3 ：3. Determine the first quartile (Q1): $Q 1 = \frac{66 + 68}{2} = 67$

Step 4 ：4. Determine the third quartile (Q3): $Q 3 = \frac{82 + 85}{2} = 83.5$