The values given below are snow depths measured as part of a study of satellite observations and water resources.
19, 18, 12, 25, 22, 8, 8, 16

-What is the third quartile?
A)8
B)22.9
C)18.55
D)9
E)20.5

Question

The values given below are snow depths measured as part of a study of satellite observations and water resources.
19, 18, 12, 25, 22, 8, 8, 16

-What is the third quartile?
A)8
B)22.9
C)18.55
D)9
E)20.5

Quizplus · Accepted Answer

The third quartile is the value that separates the top 25% of the data from the rest. To find it, we first need to put the data in order from least to greatest: 
5, 7, 8, 9, 10, 13, 15, 20. 
Then we divide it into four equal parts: 
5, 7, 8, 9 | 10, 13, 15 | 20. 
The third quartile is the median of the upper half of the data, which is 20.5 (the average of 15 and 20). Therefore, the correct answer is E.

The Values Given Below Are Snow Depths Measured as Part