
Concept explainers
a.
Find the percent of college presidents who think that higher education provides a “poor” value.
a.

Answer to Problem 1E
There are 3% of college presidents who think that higher education provides a “poor” value.
Explanation of Solution
Given info:
The table summarizes the information about the higher education system.
The table is as follows:
Poor | Only Fair | Good | Excellent | DK/NA | Total | |
U.S Adults | 321 | 900 | 750 | 107 | 64 | 2,142 |
Presidents | 32 | 222 | 622 | 179 | 0 | 1,055 |
Total | 353 | 1,122 | 1,372 | 286 | 64 | 3,197 |
Justification:
From the table the percent of college presidents think that higher education provides a “poor” value can be obtained as follows:
Total number of college presidents is 1,055 out of which 32 rated poor.
Thus, there are 3% of college presidents who think that higher education provides a “poor” value.
b.
Find the percent of U.S. adults who think the value provided is either good or excellent and what is the comparable percentage of college presidents.
b.

Answer to Problem 1E
The percent of U.S. adults thinks the value provided is either good or excellentis 40%. The comparable percentage of college presidents is 75.90%.
Explanation of Solution
Calculation:
The percent of U.S. adults who think the value provided is either good or excellent is obtained as follows:
Thus, the percent of U.S. adults who think the value provided is either good or excellent is 40%.
The comparable percentage of college presidents is obtained as follows:
Thus, the comparable percentage of college presidents is 75.90%.
c.
Compare the distribution of opinions between U.S. adults and college presidents.
c.

Explanation of Solution
Justification:
There are 3% of college presidents’ rate as a poor value and 15% of U.S adults’ rate as poor.
From the table, it can be calculated that there are 42%
The Presidents who are likely to rate college as a good or excellent value is 76% which more than U.S adults.
Thus, compared to U.S adults, college Presidents have higher opinion of the value of college.
d.
Check whether it is reasonable to conclude that 5% of all U.S adults think that the higher education system provides an excellent value or not.
d.

Answer to Problem 1E
No, it is not reasonable to conclude that 5% of all U.S adults think that the higher education system provides an excellent value.
Explanation of Solution
Justification:
The percentage of all U.S adults think that the higher education system provides an excellent value can be obtained as follows:
There are about 4.9% of all U.S adults think that the higher education system provides an excellent value.
Thus, the percentage of all U.S adults think that the higher education system provides an excellent value is not exactly 5% but it is close to it.
Thus, it is not reasonable to conclude that 5% of all U.S adults think that the higher education system provides an excellent value.
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Chapter 3 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
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