Question

Retailers	Sales
a	1700
c	12700
e	7739
k	1863
k	3400
m	1757
r	8637
s	2150
walgreen	11660
w	7250
p	5000

a: list the quartiles

b: find the interquartile range

c: identify the outlier cutoffs as well as the outliers

d: Draw a boxplot

Answer 1

a)

Entire data set (sorted):
1700 ; 1757 ; 1863 ; 2150 ; 3400 ; 5000 ; 7250 ; 7739 ; 8637 ; 11660 ; 12700

Minimum = 1700

Q1 = First Quartile = Middle of First Half of Data Set = 1863

Q2 = Median = Second Quartile = Middle of Entire Data Set = 5000

Q3 = Third Quartile = Middle of Second Half of Data Set = 8637

Maximum = 12700

b)

Interquartile range (xU-xL):8637 - 1863 = 6774

c)  A data value is considered to be an outlier if it is less than the lower fence or greater than the upper fence.

List of Outlier(s):

No Outliers

d)