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 excellent is 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 is 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
STATS:DATA+MODELS-MY LAB ACC >CUSTOM<
- The accompanying data represent the weights (in grams) of a simple random sample of 10 M&M plain candies. Determine the shape of the distribution of weights of M&Ms by drawing a frequency histogram. Find the mean and median. Which measure of central tendency better describes the weight of a plain M&M? Click the icon to view the candy weight data. Draw a frequency histogram. Choose the correct graph below. ○ A. ○ C. Frequency Weight of Plain M and Ms 0.78 0.84 Frequency OONAG 0.78 B. 0.9 0.96 Weight (grams) Weight of Plain M and Ms 0.84 0.9 0.96 Weight (grams) ○ D. Candy Weights 0.85 0.79 0.85 0.89 0.94 0.86 0.91 0.86 0.87 0.87 - Frequency ☑ Frequency 67200 0.78 → Weight of Plain M and Ms 0.9 0.96 0.84 Weight (grams) Weight of Plain M and Ms 0.78 0.84 Weight (grams) 0.9 0.96 →arrow_forwardThe acidity or alkalinity of a solution is measured using pH. A pH less than 7 is acidic; a pH greater than 7 is alkaline. The accompanying data represent the pH in samples of bottled water and tap water. Complete parts (a) and (b). Click the icon to view the data table. (a) Determine the mean, median, and mode pH for each type of water. Comment on the differences between the two water types. Select the correct choice below and fill in any answer boxes in your choice. A. For tap water, the mean pH is (Round to three decimal places as needed.) B. The mean does not exist. Data table Тар 7.64 7.45 7.45 7.10 7.46 7.50 7.68 7.69 7.56 7.46 7.52 7.46 5.15 5.09 5.31 5.20 4.78 5.23 Bottled 5.52 5.31 5.13 5.31 5.21 5.24 - ☑arrow_forwardく Chapter 5-Section 1 Homework X MindTap - Cengage Learning x + C webassign.net/web/Student/Assignment-Responses/submit?pos=3&dep=36701632&tags=autosave #question3874894_3 M Gmail 品 YouTube Maps 5. [-/20 Points] DETAILS MY NOTES BBUNDERSTAT12 5.1.020. ☆ B Verify it's you Finish update: All Bookmarks PRACTICE ANOTHER A computer repair shop has two work centers. The first center examines the computer to see what is wrong, and the second center repairs the computer. Let x₁ and x2 be random variables representing the lengths of time in minutes to examine a computer (✗₁) and to repair a computer (x2). Assume x and x, are independent random variables. Long-term history has shown the following times. 01 Examine computer, x₁₁ = 29.6 minutes; σ₁ = 8.1 minutes Repair computer, X2: μ₂ = 92.5 minutes; σ2 = 14.5 minutes (a) Let W = x₁ + x2 be a random variable representing the total time to examine and repair the computer. Compute the mean, variance, and standard deviation of W. (Round your answers…arrow_forward
- The acidity or alkalinity of a solution is measured using pH. A pH less than 7 is acidic; a pH greater than 7 is alkaline. The accompanying data represent the pH in samples of bottled water and tap water. Complete parts (a) and (b). Click the icon to view the data table. (a) Determine the mean, median, and mode pH for each type of water. Comment on the differences between the two water types. Select the correct choice below and fill in any answer boxes in your choice. A. For tap water, the mean pH is (Round to three decimal places as needed.) B. The mean does not exist. Data table Тар Bottled 7.64 7.45 7.46 7.50 7.68 7.45 7.10 7.56 7.46 7.52 5.15 5.09 5.31 5.20 4.78 5.52 5.31 5.13 5.31 5.21 7.69 7.46 5.23 5.24 Print Done - ☑arrow_forwardThe median for the given set of six ordered data values is 29.5. 9 12 23 41 49 What is the missing value? The missing value is ☐.arrow_forwardFind the population mean or sample mean as indicated. Sample: 22, 18, 9, 6, 15 □ Select the correct choice below and fill in the answer box to complete your choice. O A. x= B. μεarrow_forward
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