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Practice Final
Part 1:
Organize, describe and interpret data sets in meaningful tables and graphs, and
evaluate measures of central tendency and variation.
The annual oil consumption per person (in barrels) is given below for 13
different countries.
a. Find the mean, median and mode of this data.
SOLUTION
x
2
(
)
x
μ

1
121
2
100
4
64
7
25
8
16
18
36
12
0
13
1
11
1
12
0
16
16
26
196
26
196
x
∑
=
156
2
(
)
x

∑
=
77
2
Indi
a
Chin
a
Braz
il
Mexic
o
Russi
a
S.Kore
a
Ital
y
Franc
e
Brita
in
German
y
Japa
n
Canad
a
U
S
1
2
4
7
8
18
12
13
11
12
16
26
26
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View Full Document Mean =
156
12
13
x
n
μ
=
=
=
∑
Median = Value of the middle term = 12
Mode = Most repeated value
There are two modes 12,
26
b. Find the range and standard deviation of this data.
SOLUTION
Range = Max valueMin value = 261=25
Standard deviation
2
(
)
772
8.02
1
13 1
x
n
σ

=
=
=


∑
c.
Construct the five number summary and the box and whisker plot for
the scores. Identify each of the five summary numbers.
SOLUTION
The five number summary
Minimum value = 1
First quartile
1
Q
=7
Median = 12
Third quartile
3
Q
=
16
Maximum value = 26
T
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This note was uploaded on 07/10/2011 for the course ACCTG 201 taught by Professor Wasson during the Spring '03 term at San Diego State.
 Spring '03
 Wasson

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