
Concept explainers
(a)
To find: The box and the whisker plot and the shape of the distribution,
(a)

Answer to Problem 2CYU
The majority of the data is same throughout and the graph is shown in Figure 3
Explanation of Solution
Given:
The data for the 20 random people is shown in Table 1
4 | 7 | 5 | 13 | 3 | 22 | 13 | 6 | 5 | 10 |
7 | 18 | 4 | 16 | 8 | 5 | 15 | 3 | 12 | 6 |
Table 1
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 of the data is same throughout.
(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 2CYU
The mean of the model is 9.1, the standard deviation of the model is 5.5 and the median is 7.
Explanation of Solution
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 model is 9.1.
The standard deviation of the model is 5.5.
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 is 7.
Chapter 11 Solutions
Glencoe Algebra 2 Student Edition C2014
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