Performance-based logistics. Refer to the Journal of Business Logistics (Vol. 36, 2015) study of the factors that lead to successful performance-based logistics (PBL) projects, Exercise $1.15$ (p. 25). Recall that opinions of a sample of 17 Department of Defense employees and suppliers were solicited during interviews. Demographics (current position, organization type, experience) were recorded for each interviewee and the data listed in the table below. Find and interpret the main years of experience for the 17 interviewees.

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

Rankings of research universities. Based on factors (e.g., academic reputation, financial aid offerings, overall cost, and success of graduates in the post-college job market) that actual college freshmen said were most important to their college decision, College Choice developed their 2015 Rankings of National Research Universities. Data for the top 50 universities are saved in the TOPUNIV file. Several are listed in the accompanying table above. The average financial aid awarded values were determined by recording the financial aid awarded to each freshman who attended the university in 2015. Does this statistic represent a population or sample mean? Interpret this value for Harvard University.

Hotels' use of ecolabels. Ecolabels such as Energy Star, Green Key, and Audubon International are used by hotels to advertise their energy-saving and conservation policies. The Journal of Vacation Marketing (January 2016) published a study to investigate how familiar travelers are with these ecolabels and whether travelers believe they are credible. A sample of 392 adult travelers were administered a questionnaire. One question showed a list of 6 different ecolabels, and asked, "How familiar are you with this ecolabel, on a scale of 1 (not familiar at all) to 5 (very familiar)." Summarized results for the numerical responses are given in the table. Based on these summary statistics, which ecolabel appears to be most familiar to travelers?

Hotels' use of ecolabels. Ecolabels such as Energy Star, Green Key, and Audubon International are used by hotels to advertise their energy-saving and conservation policies. The Journal of Vacation Marketing (January 2016) published a study to investigate how familiar travelers are with these ecolabels and whether travelers believe they are credible. A sample of 392 adult travelers were administered a questionnaire. One question showed a list of 6 different ecolabels, and asked, "How familiar are you with this ecolabel, on a scale of 1 (not familiar at all) to 5 (very familiar)." Summarized results for the numerical responses are given in the table. Give a practical interpretation of the response mode for Energy Star.

Hotels' use of ecolabels. Ecolabels such as Energy Star, Green Key, and Audubon International are used by hotels to advertise their energy-saving and conservation policies. The Journal of Vacation Marketing (January 2016) published a study to investigate how familiar travelers are with these ecolabels and whether travelers believe they are credible. A sample of 392 adult travelers were administered a questionnaire. One question showed a list of 6 different ecolabels, and asked, "How familiar are you with this ecolabel, on a scale of 1 (not familiar at all) to 5 (very familiar)." Summarized results for the numerical responses are given in the table. Give a practical interpretation of the median response for Energy Star.