STATISTICAL TECHNIQUES-ACCESS ONLY
16th Edition
ISBN: 9780077639648
Author: Lind
Publisher: MCG
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Textbook Question
Chapter 2, Problem 32CE
David Wise handles his own investment portfolio, and has done so for many years. Listed below is the holding time (recorded to the nearest whole year) between purchase and sale for his collection of 36 stocks.
- a. How many classes would you propose?
- b. What class interval would you suggest?
- c. What quantity would you use for the lower limit of the initial class?
- d. Using your responses to parts (a), (b), and (c), create a frequency distribution.
- e. Describe the shape of the frequency distribution.
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Can you provide any explanation for these results? For THE 3 TABS BELOW: Tab 1, Tab 2 & Tab 3
TAB 1.
Year
Age of Miss America
Murder by steam, hot vapors and hot objects
Dev(x)
Dev(y)
CP
1999
24
7
1.9
2.5
4.69
2000
24
7
1.9
2.5
4.69
2001
24
7
1.9
2.5
4.69
2002
21
3
-1.1
-1.5
1.69
2003
22
4
-0.1
-0.5
0.05
2004
21
3
-1.1
-1.5
1.69
2005
24
8
1.9
3.5
6.60
2006
22
4
-0.1
-0.5
0.05
2007
20
2
-2.1
-2.5
5.32
2008
19
3
-3.1
-1.5
4.78
2009
22
2
-0.1
-2.5
0.23
Mean
22.1
5
Sum
34.45
Standard Deviation
1.75810
2.25227
Covariance
3.45
Correlation Coefficient
0.87013
0.87013
TAB 2
Year
Letter in Winning World of Scripps National Spelling Bee
Number of people Killed by venomous spider
Dev(x)
Dev(y)
CP
1999
9
6
-1.0
-1.4
1.36
2000
8
5…
Chapter 2 Solutions
STATISTICAL TECHNIQUES-ACCESS ONLY
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