Question

Use the data set to answer questions 1-3.

25, 8, 10, 35, 5, 45, 40, 30, 20
What is the upper quartile of the given data set?
A. 35
B. 37.5
C. 37
D. 40

Answer 1

Q3 = 37.5

Explanation:

Place the data items in order from least to greatest

5, 8, 10, 20, 25, 30, 35, 40, 45

Find the number in the middle 25

Then take the number on the right, take the two numbers in the very middle add them together and divide by 2. 35+40 = 75/2 =37.5

If you don't have to show your worK:

TI84 calculator [stat][edit]input data [stat][calc][1-var stats]{list:L1][enter][enter]scroll down till Q3