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A sample of 40 endangered species was obtained and the length of time (in months) since being placed on the list was recorded for each species. A stemplot of these data follows. In the stemplot 5|2 represents 52 months. Please explain how to solve.
Reference: Ref 1-7
The number of species in the sample that have been on the list for more than 6 years is
1. 10.
2. 12.
3. 14.
4. 18.
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