Answer:
D 9.5
Step-by-step explanation:
Write data in increasing order.
3, 5, 5, 6, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 10, 10, 10, 10, 11
Find the median
<u>3, 5, 5, 6, 6, 6, 7, 7, 8, 8,</u> 8, <u>8, 8, 8, 9, 9, 10, 10, 10, 10, 11</u>
Median is 8
Lower half of the data is : 3, 5, 5, 6, 6, 6, 7, 7, 8, 8,
First quartile is the median of the lower half of the data=6+6 /2 =6
Upper half of the data is: 8, 8, 8, 9, 9, 10, 10, 10, 10, 11
The Third quartile is the median of the upper half=9+10 / 2 = 9.5
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