Determine the quartile or interquartile range as specified.
-Determine the interquartile range.
2, 3, 6, 8, 9, 12, 2,
A)3, 6, 8, 9, 12 6.5
B)5.5
C)3
D)6

Question

Determine the quartile or interquartile range as specified.
-Determine the interquartile range. 
2, 3, 6, 8, 9, 12, 2, 
A)3, 6, 8, 9, 12 6.5
B)5.5
C)3
D)6

Quizplus · Accepted Answer

The interquartile range is the difference between the third quartile and the first quartile. The third quartile is the median of the upper half of the data, and the first quartile is the median of the lower half of the data. The upper half of the data is 6, 8, 9, 12, and the lower half of the data is 2, 3, 6, 8. The median of the upper half is 8, and the median of the lower half is 3. Therefore, the interquartile range is 8 - 3 = 6.

Determine the Quartile or Interquartile Range as Specified