STATS FINAL SET | 119 QUESTIONS AND ANSWERS |
WITH COMPLETE SOLUTION!!
Arithmetic operations are inappropriate for Answer - categorical data
The most common type of observational study is a(n) Answer - survey
The term data warehousing is used to refer to the process of doing all of the
following, except _____ the data. Answer - mining
Data collected at the same, or approximately the same, point in time are _____
data. Answer - cross-sectional
Which of the following is an example of categorical data?
a. number of square feet of carpet
b. social security number
c. height, in meters, of a diving board
d. score on a multiple-choice exam Answer - b. social security number
Exhibit 2-4A survey of 400 college seniors resulted in the following
crosstabulation regarding their undergraduate major and whether or not they
plan to go to graduate school.
Undergraduate Major
Graduate, Bussiness, Enginerr, Other, TOTal
,Yes, 35, 42, 63, 140
No, 91, 104, 65, 260
Total, 126, 146, 128, 400
Of those students who are majoring in Business, what percentage plans to go
to graduate school? Answer - 27.78%
Exhibit 2-3. The number of sick days taken (per month) by 200 factory workers
is summarized below.
No. of Days........Frequency
0-5....120
6-10...65
11-15....14
16-20...1
The relative frequency of workers who took 10 or fewer sick days is _____.
Answer - 0.925
Exhibit 2-3. The number of sick days taken (per month) by 200 factory workers
is summarized below.
No. of Days........Frequency
0-5....120
6-10...65
11-15....14
16-20...1
The number of workers who took at most 10 sick days per month is _____.
Answer - 185
, Exhibit 2-1. The numbers of hours worked (per week) by 400 statistics students
are shown below.
No. of Hours...........Frequency
0 <= x < 10 ..... 20
10 ≤ x < 20 .....80
20 ≤ x < 30 ..... 200
30 ≤ x < 40 ...... 100
The percentage of students working between 10 and 20 hours is _____. Answer
- 20%
Exhibit 3-4. The following is the frequency distribution for the speeds of a
sample of automobiles traveling on an interstate highway.
Speed (mph) ....... Frequency
50-54 ..... 2
55-59 ......4
60-64 ..... 5
65-69 ......10
70-74 ..... 9
75-79 ..... 5
....................35
The mean is _____. Answer - 67
If r = 0.48 for data set A and r = −0.48 for data set B, which of the following is
true?
WITH COMPLETE SOLUTION!!
Arithmetic operations are inappropriate for Answer - categorical data
The most common type of observational study is a(n) Answer - survey
The term data warehousing is used to refer to the process of doing all of the
following, except _____ the data. Answer - mining
Data collected at the same, or approximately the same, point in time are _____
data. Answer - cross-sectional
Which of the following is an example of categorical data?
a. number of square feet of carpet
b. social security number
c. height, in meters, of a diving board
d. score on a multiple-choice exam Answer - b. social security number
Exhibit 2-4A survey of 400 college seniors resulted in the following
crosstabulation regarding their undergraduate major and whether or not they
plan to go to graduate school.
Undergraduate Major
Graduate, Bussiness, Enginerr, Other, TOTal
,Yes, 35, 42, 63, 140
No, 91, 104, 65, 260
Total, 126, 146, 128, 400
Of those students who are majoring in Business, what percentage plans to go
to graduate school? Answer - 27.78%
Exhibit 2-3. The number of sick days taken (per month) by 200 factory workers
is summarized below.
No. of Days........Frequency
0-5....120
6-10...65
11-15....14
16-20...1
The relative frequency of workers who took 10 or fewer sick days is _____.
Answer - 0.925
Exhibit 2-3. The number of sick days taken (per month) by 200 factory workers
is summarized below.
No. of Days........Frequency
0-5....120
6-10...65
11-15....14
16-20...1
The number of workers who took at most 10 sick days per month is _____.
Answer - 185
, Exhibit 2-1. The numbers of hours worked (per week) by 400 statistics students
are shown below.
No. of Hours...........Frequency
0 <= x < 10 ..... 20
10 ≤ x < 20 .....80
20 ≤ x < 30 ..... 200
30 ≤ x < 40 ...... 100
The percentage of students working between 10 and 20 hours is _____. Answer
- 20%
Exhibit 3-4. The following is the frequency distribution for the speeds of a
sample of automobiles traveling on an interstate highway.
Speed (mph) ....... Frequency
50-54 ..... 2
55-59 ......4
60-64 ..... 5
65-69 ......10
70-74 ..... 9
75-79 ..... 5
....................35
The mean is _____. Answer - 67
If r = 0.48 for data set A and r = −0.48 for data set B, which of the following is
true?
