# Prob

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Page 245

7         Types of Common Stocks                         Common Stocks for Baggage Investment
Baggage Investment (thousands of \$)                              (x\$1000)

Type                  1993       1999
Railroad                39         49        5,000
Public Utility         815      1,217
Industrial & Misc.   2,329      4,666
4,000
Total                3,183      5,932

3,000
\$

2,000

1,000

-
1993               1999
Year

Railroad      Public Utility          Industrial & Misc.

9
Types of Common Stocks                         Type of Stock for Baggage
1999
Baggage Investment (thousands of \$)
1999
Type                             1999
Public Utility                  1,217
Industrial & Misc.              4,666
Total                           5,932                              1%
Public
Utility
20%

Indust. &
Misc.
78%

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page 249

1          3       Mean           6          Also check the formula:      6
1       Median         5
4       Mode           4
8
7
12
5
10
4
54

3      Data        Sorted Data
2               2
11               4
15              11
13               Median
19              15
the mode since it occurs twice -
19                19
19      the other values occur only
4             19                      once.

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Page 254

1             29                 1a)         The range can be reported as
8                             the smallest to largest value
12                             or the difference between
6                             the smallest to largest value
18
1                             Range =                 28
15                                            or 1 to 29
16

1b)    Sorted data
1                                                          IQR =   Q3 - Q1 =   10
6
>          7 = Q1 or the lower quartile                 QD = (Q3 - Q1 )/2 = 5
8
12
>         13.5 = Q2 or the median
15
16
>           17 = Q3 or the upper quartile
18
29

5 b)            x      x - MEAN (x - MEAN)2
29           15.9      252.0
8           -5.1       26.3
12           -1.1        1.3
6           -7.1       50.8
18            4.9       23.8
1          -12.1      147.0
15            1.9        3.5
16            2.9        8.3
512.9

Mean =             13.1                ALSO NOTE THE FOLLOWING:
Population                             Sample
Variance =         64.1                Variance =           73.3
Population                             Sample
Standard             8.0               Standard
Deviation                              Deviation             8.6

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