85. Refer to Exhibit 1-4. How many variables are in this data set?
a.
3
b.
4
c.
5
d.
6
ANS: D PTS: 1 TOP: Descriptive Statistics
86. Refer to Exhibit 4-1. How many observations are in this data set?
a.
5
b.
6
c.
3
d.
45
ANS: D PTS: 1 TOP: Descriptive Statistics
PROBLEM
1. After graduation ceremonies at a university, six graduates were asked whether they were in favor of (identified by 1) or against (identified by 0) abortion. Some information about these graduates is shown below.
Graduate
Sex
Age
Abortion Issue
Class Rank
Marissa
F
24
1
1
Jason
M
22
1
2
Wendy
F
41
0
3
Edward
M
38
0
20
Jennifer
F
25
1
4
Tim
M
19
0
8
a.
How many elements are in the data set?
b.
How many variables are in the data set?
c.
How many observations are in the data set?
d.
Which of the above variables (Sex, Age, Abortion Issue, Class rank) are categorical and which are quantitative variables?
e.
Are arithmetic operations appropriate for the variable "abortion issue"?
ANS:
a.
6
b.
4
c.
6
d.
Sex: categorical
Age: quantitative
Abortion Issue: categorical
Class Rank: categorical
e.
No
PTS: 1 TOP: Descriptive Statistics
2. A recent issue of Fortune Magazine reported that the following companies had the lowest sales per employee among the Fortune 500 companies.
Sales per Employee
(In $1,000s)
Sales
Rank
Company
Seagate Technology
42.20
285
SSMC
42.19
414
Russel
41.99
480
Maxxam
40.88
485
Dibrell Brothers
22.56
470
a.
How many elements are in the above data set?
b.
How many variables are in the above data set?
c.
How many observations are in the above data set?
d.
Name the variables and indicate whether they are categorical or quantitative.
ANS:
a.
5
b.
2
c.
5
d.
Sales per employee: quantitative; Sales rank: categorical
PTS: 1 TOP: Descriptive Statistics
3. The following shows the temperatures (high, low) and weather conditions in a given Sunday for some selected world cities. For the weather conditions, the following notations are used: c = clear; cl = cloudy; sh = showers; pc = partly cloudy.
City
Hi
Lo
Condition
Acapulco
99
77
pc
Bangkok
92
78
pc
Mexico City
77
57
sh
Montreal
72
56
pc
Paris
77
58
c
Rome
88
68
cl
Toronto
78
61
c
a.
How many elements are in this data set?
b.
How many variables are in this data set?
c.
How many observations are in this data set?
d.
Name the variables and indicate whether they are categorical or quantitative.