Compute the third quartile for the following data. 10, 15, 17, ...

[pepyto]

Compute the third quartile for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22
 a. 21.25 b. 15.5
  c. 21.5 d. 11.75

Question 2

Compute the 50th percentile for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22
 a. 18.6 b. 13.3
  c. 15.5 d. 17.7

[diesoon]

Answer to Question 1

a
RATIONALE: Quartiles divide data into four parts, with each part containing approximately one-fourth, or 25 percent, of the observations. This can be calculated with the Excel function =QUARTILE.EXC(range,3) = 21.25.

Answer to Question 2

c
RATIONALE: A percentile is the value of a variable at which a specified (approximate) percentage of observations are below that value. 50th percentile = median = 15.5.