Question 1
1. Determine which of the following statements is descriptive in nature and which is inferential. Refer to the data below in How Old is My Fish?
How Old is My Fish
Average age by length of largemouth bass in new York State
Length
8
9
10
11
12
13
14
Age
2
3
3
4
4
5
5
a. All 9-inch largemouth bass in New York State are an average of 3 years old
b. Of the largemouth bass used in the sample to make up the NYS DEC Freshwater Fishing Guide, the average age of 9-inch largemouth bass was 3 years
In your answer also describe and explain the difference between descriptive statistics and inferential statistics
Question 2
2. Since 1981, Fortune magazine has been tracking what they judge to be the “best 100 companies to work for.” The companies must be at least ten years old and employ no less than 500 people. Below are the top 25 from the list compiled in 1998, together with each company’s percentage of females, percentage of job growth over a 2 year span, and number of hours of professional training required each year by the employer.
Company Name
Women (%)
Job Growth (%)
Training (hr/yr)
Southwest Airlines
55
26
15
Kingston Technology
48
54
100
SAS Institute
53
34
32
FEL-Pro
36
10
60
TDIndustries
10
31
40
MBNA
58
48
48
W.L.Gore
43
26
27
Microsoft
29
22
8
Merck
52
24
40
Hewlett-Packard
37
10
0
Synovus Financial
65
23
13
Goldman Sachs
40
13
20
MOOG
19
17
25
DeLoitte & Touche
45
23
70
Corning
38
9
80
Wegmans Food Products
54
3
30
Harley-Davidson
22
15
50
Federal Express
32
11
40
Proctor & Gamble
40
1
25
Peoplesoft
44
122
0
First Tennessee Bank
70
1
60
J.M. Smucker
48
1
24
Granite Rock
17
29
43
Petagonia
52
5
62
Cisco Systems
25
189
80
a. Find the mean, range, variance, and standard deviation for each of the three variables shown in the list. Present your results in a table.
b. Using your results from (a), compare the distributions for job growth percentage and percentage of women employed. What can you conclude?
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FINAL EXAM
