
Concept explainers
(a)
To find: The box and the whisker plot to create a box and whisker plot for each of the data set.
(a)

Answer to Problem 9PPS
The figure 3 shows that the majority on the middle and there is tail on the left so the distribution is negatively skewed.
Explanation of Solution
Given:
The data set for the public college is
The data for the private college is
Calculation:
Use the graphing calculator.
Press STAT and select edit option and enter the values of the table as shown in Figure 1
Figure 1
Press 2nd and y= and select option 1 on the plot 1 as shown in Figure 2
Figure 2
Press graph key to trace the graph as shown in Figure 3
Figure 3
The figure 3 shows that the majority on the middle and there is tail on the left so the distribution is negatively skewed.
(b)
To find: The centre and the spread of the data using either the mean and standard deviation of the five number summary to justify the choice.
(b)

Answer to Problem 9PPS
The mean of the first model is 4031, the standard deviation of the model is 626 and the median is 3999. The mean of the second model is 12803, the standard deviation of the model is 2915 and the median is 12877.
Explanation of Solution
Calculation:
Press the Stat and select CLAC option and select 1 VAR stats and press enter as shown in Figure 4
Figure 4
Press enter to obtain the values as shown in Figure 5
Figure 5
From above the mean of the first model is 4031
The standard deviation of the first model is 626.
From above the mean of the second model is 12803
The standard deviation of the second model is 2915.
Press the arrow down of the display screen to find the display screen to find the median as shown in Figure 6
Figure 6
Thus, the median of the first model is 3999.
Thus, the median of the second model is 12877.
Chapter 11 Solutions
Glencoe Algebra 2 Student Edition C2014
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