Statistics for Managerial Decisions Question 2022

STATISTICS FOR MANAGERIAL DECISIONS

STATISTICS FOR MANAGERIAL DECISIONS
QUESTION ONE
Part a
The stem and leaf plot for the quarterly stock prices of WPL and WOR from the year
2003 to 2015 is as given in the plot in Figure 1: Stem and Leaf plot for WPL and WOR below:
Data source: (Yahoo Finance, 2019).
Figure 1: Stem and Leaf plot for WPL and WOR
Part b
The combined plot of the frequency polygon for WOR and relative frequency polygon
for WPL for the quarterly stock prices of WPL and WOR from the year 2003 to 2015 is as given
in the plot in Figure 2: Combined WOR-WPL Frequency Plot below. Data Source: (Yahoo
Finance, 2019)
2

STATISTICS FOR MANAGERIAL DECISIONS
1
4
7
10
13
16
19
22
25
28
31
34
37
40
43
46
49
52
0
10
20
30
40
50
60
wor - wpl comparison
WOR WPL
Share Prices
Figure 2: Combined WOR-WPL Frequency Plot
Part c
The bar chart plot for the comparison of the Market Capital for the 2015 for the different
companies in the Australian energy sector is as given in the plot in Figure 3: Energy Sector
Market Capital 2015 below. The plot shows WPL had the highest market capital while WOR had
the lowest. Data Source: (ASX, 2019)
3

STATISTICS FOR MANAGERIAL DECISIONS
WPL WOR ORG STO CTX SOL
0
5
10
15
20
25
30
Market Capital 2015
Companies
Market Capital (billions A$)
Figure 3: Energy Sector Market Capital 2015
Part d
Table 1: Quarterly Opening Values Comparison below shows the comparison of the
quarterly opening values for WPL and WOR from 2003 to 2015. From the table, 36.54% of the
quarterly opening values of WPL were over $40 while 1.9% of the quarterly opening values of
the WOR were over $40.
Table 1: Quarterly Opening Values Comparison
WPL WOR
Number of quarterly opening values greater than
$40
19 1
Proportions of quarterly opening values greater
than $40
36.538461
54
1.92307
7
4