91Ó°ÊÓ

Performance-based logistics.Refer to the Journal of Business Logistics(Vol. 36, 2015) study of the factors thatlead to successful performance-based logistics (PBL) projects, Exercise 1.15 (p. 49). Recall that the opinions of a sampleof 17 Department of Defense employees and suppliers weresolicited during interviews. Demographics (current position,organization type, experience) were recorded for each intervieweeand the data are listed in the table below.

a.Find and interpret the mean years of experience for the 17 interviewees.

b.Find and interpret the median years of experience for the 17 interviewees.

c.Find and interpret the mode of the 17 years of experience values.

Interviewee	Position	Organization	Experience(years)
1	Vice president	Commercial	30
2	Postproduction	Government	15
3	Analyst	Commercial	10
4	Senior manager (mgr.)	Government	30
5	Support chief	Government	30
6	Specialist	Government	25
7	Senior analyst	Commercial	9
8	Division chief	Government	6
9	Item mgr.	Government	3
10	Senior mgr.	Government	20
11	MRO mgr.	Government	25
12	Logistics mgr.	Government	30
13	MRO mgr.	Commercial	10
14	MRO mgr.	Commercial	5
15	MRO mgr.	Commercial	10
16	Specialist	Government	20
17	Chief	Government	25

Step by step solution

01

Calculating and Interpreting the Mean

$$\begin{gathered} Mean=\frac{Sumofexpirience\left(years\right)ofallemployees}{Noofemployees} \\ Mean=\frac{30+15+10+30+30+25+9+6+3+20+25+30+10+5+10+20+25}{17} \\ =\frac{303}{17} \\ =17.82 \end{gathered}$$

Therefore, the average years of experience of the interviewed employees were 17.82 years.

02

Computing and Analyzing the Median

Arranging the years of experience of all employees in ascending order we get,

(3, 5, 6, 9, 10, 10, 10, 15, 20, 20, 25, 25, 25, 30, 30, 30, 30)

Therefore, 20 is the median years of experience of the employees.

This means the experience of half the employees is 20 years or less, and the experience of the other half of employees is more than 20 years.

03

Estimating and Comprehending the Mode

30 is repeated maximum times in the data set. Therefore, 30 years of experience is the modeand itis the most common attribute in the group.

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