Question 1

TABLE 2-18
The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction.
 
-Referring to Table 2-18, if a student is randomly selected, his/her most likely level of satisfaction will be in the 70s among the 40s, 50s, 60s, 70s, 80s and 90s.

Accepted Answer

The stem-and-leaf display shows that the most frequent stem is 7, indicating that the majority of the students have their satisfaction level in the 70s. Therefore, it is more likely that a randomly selected student will have a satisfaction level in the 70s than any other range.

Question 2

TABLE 2-18
The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction.
 
-Referring to Table 2-18, the level of satisfaction is concentrated around 75.

Accepted Answer

The stem-and-leaf display shows that the majority of the responses fall between 70 and 79, with a concentration around 75. Therefore, the statement is true.

Question 3

Given below is the scatter plot of the market value (thousands$)and profit (thousands$)of 50 U.S. companies. Higher market values appear to be associated with higher profits.

Accepted Answer

The scatter plot shows a positive correlation between market value and profit. This means that as market value increases, profit also tends to increase. Therefore, higher market values appear to be associated with higher profits, making the statement true.

Question 4

TABLE 2-18
The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction.
 
-Referring to Table 2-18, how many students have a satisfaction level of at least 80?

Accepted Answer

The answer of TABLE 2-18
The stem-and-leaf display below shows the...

Question 5

Given below is the scatter plot of the price/earnings ratio versus earnings per share of 20 U.S. companies. There appears to be a negative relationship between price/earnings ratio and earnings per share.

Accepted Answer

As per the description, there appears to be a negative relationship between price/earnings ratio and earnings per share. This indicates that as the earnings per share increase, the price/earnings ratio decreases, which implies a negative relationship between the two variables.

Question 6

Given below is the scatter plot of the price/earnings ratio versus earnings per share of 20 U.S. companies. There appear to be a positive relationship between price/earnings ratio and earnings per share.

Accepted Answer

The answer of Given below is the scatter plot of...

Question 7

Given below is the scatter plot of the number of employees and the total revenue ($millions)of 20 U.S. companies. Companies that have higher numbers of employees appear to also have higher total revenue.

Accepted Answer

The scatter plot shows a positive correlation between the number of employees and total revenue, indicating that companies with higher numbers of employees tend to have higher total revenue. Therefore, the statement is true.

Question 8

TABLE 2-18
The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction.
 
-Referring to Table 2-18, if a student is randomly selected, his/her most likely level of satisfaction will be in the 60s among the 40s, 50s, 60s, 70s, 80s and 90s.

Accepted Answer

The answer of TABLE 2-18
The stem-and-leaf display below shows the...

Question 9

Given below is the scatter plot of the number of employees and the total revenue ($millions)of 20 U.S. companies. There appears to be a positive relationship between total revenue and the number of employees.

Accepted Answer

The scatter plot clearly shows an upward trend, indicating a positive relationship between total revenue and the number of employees. As the number of employees increases, the total revenue also seems to increase, suggesting that there is a correlation between these two variables.

Question 10

Given below is the scatter plot of the market value (thousands$)and profit (thousands$)of 50 U.S. companies. There appears to be a negative relationship between market value and profit.

Accepted Answer