problemset1solution - PAM 2100 Instructor: Salam Abdus...

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PAM 2100 Instructor: Salam Abdus Problem Set #1 Answer key Total: 10 points Circle all of your final answers. Put your name and your section number at the top. #1) “Conservationists have despaired over destruction of tropical rainforest by logging, clearing, and burning.” These words begin a report on a statistical study of the effects of logging in Borneo. Researchers compared forest plots that had never been logged (Group 1) with similar plots nearby that had been logged 1 year earlier (Group 2) and 8 years earlier (Group 3). All plots were 0.1 hectare in area. Here are the counts of trees for plots in each group: Group 1 27 22 29 21 19 33 16 20 24 27 28 19 Group 2 12 12 15 9 20 18 17 14 14 2 17 19 Group 3 18 4 22 15 18 19 22 12 12 a) Draw a separate stemplot for each group. (1.5 points) Ans. See attached sheet. 0.5 points for each correct stemplot. b) Calculate the mean and standard deviation for group 1. (Round the mean to two decimal places. Use this number to calculate the standard deviation. Round the standard
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problemset1solution - PAM 2100 Instructor: Salam Abdus...

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