3.87
3.88
2
2.2
2.4
270
290
310
330
350
3.89a
Imports from Mexico
b. Exports to Mexico
20000
25000
10000
12000
14000
16000
c. Balance of Trade (Imports from Mexico – exports to Mexico)
d. The United States imports more products form Mexico than it imports from Mexico. Moreover, the trade
3.90
5000
6000
7000
8000
1000
1200
1400
There is a moderately strong negative linear relationship.
3.91
3.92
3.93
Fatal accidents
20
30
40
40
50
Passenger deaths
The number of fatal accidents and the number of deaths have been decreasing.
3.94
20
25
30
35
800
1000
1200
1400
3.95
The histogram tells us that about 70% of gallery visitors stay for 60 minutes or less and most of the remainder leave
within 120 minutes. Although there are other plans, the gallery director proposed the following plan. Admit 200
3.96 Business Statistics course (Example 3.3)
100
150
200
100
150
200
Mathematical Statistics course (Example 3.4)
There appears to be a stronger linear relationship between marks in the mathematical statistics course and calculus
than the relationship between the marks in the business statistics course and the marks in calculus.
3.97 Business Statistics course (Example 3.3)
70
80
90
100
80
90
100
Mathematical Statistics course (Example 3.4)
3.98a
80
90
100
70
80
90
100
b
40
60
80
50
60
70
Case 3.1 Line Chart of Temperature Anomalies
There is a clear upward trend of about 1 degree Celsius over the 130 years.
Scatter Diagram of National Climate Data Center Land and Sea Temperature Anomalies and CO2 Levels (1958–
2009)
There is a moderately strong positive linear relationship between carbon dioxide levels and temperature anomalies.
0.5
1
1.5
2
2.5
0.5
1
1.5
2
Case 3.2
40,000
50,000
60,000
70,000
80,000
90,000
GDP