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problemset1 - Here are the counts of trees for plots in...

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PAM 210 Lecture 1 Instructor: Salam Abdus Problem Set #1 Posted: 28 th January, 2008. Due: 4 th February, Monday, 2008, in class, at 10:10 am 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.
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Unformatted text preview: 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. b) Calculate the mean and standard deviation for Group 1. ( Round the mean to two decimal places. Use that number to calculate the standard deviation. Round the standard deviation to two decimal places.) #2) Consider a data set that includes every whole number from 1 to 113: 1, 2, 3, 4, 5,…. .,111, 112, 113 What is the five-number summary of this data set?...
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