find the first quartile of 7,8,7,9,11,8,7,9,6 and 8.
...find the first quartile of 7,8,7,9,11,8,7,9,6 and 8.
8.5
7.0
7.5
8.0
Correct answer is B
Rearrange data in increasing order: 6,7,7,7,8,8,8,9,9 and 11
First quartile (ungrouped data) = n4th value
= 104
= 2.5th value
= 7+72
= 7.0
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