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.
a. Give a practical interpretation of the mean response for Energy Star.
b. Give a practical interpretation of the median response for Energy Star.
c. Give a practical interpretation of the response mode for Energy Star.
d. Based on these summary statistics, which ecolabel appears to be most familiar to travelers?

*% high meaning represents the percentage of alumni who say their work makes the world a better place;
€ % STEM represents the percentage of degrees awarded in science, technology, engineering, or mathematics.

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Ecolabel Mean Median Mode Energy Star TripĀdvisor 4.44 3.57 5 4 4 Greenleaders Audubon International U.S. Green 2.41 2 2.28 2 Building Council Green Business 2.25 1. Bureau Green Key 2.01 2. Academic Reputation Score Average Financial Aid Median Salary Average During Early Career % STEM (100-pt. scale) 99 % High Meaning* 65% 68% 50% Public/ Net Cost Rank University Harvard University Yale University University of California Berkeley Private Private Private Public Awarded $41,555 $39,771 $16,141 to Attend $14,455 $18,479 $16,178 $61,400 $60,300 $59,500 Degrees 28% 21% 31% 20 97 79 University of Virginia Carnegie Mellon University Pepperdine University Private $16,834 23 27 76 76 $12,672 $33,257 $54,700 $64,700 52% 46% 24% 51% Public Private $24,263 47 60 $25,345 51% 4% $29,926 $48,300