Question

Dutch Elm disease is one of the most destructive Urban Forest Diseases which affects native Elm speci caused the distruction of most of the American Elm populations in the Northeastern and Midwestern states ies. Since its introduction into the US in the 1930's it has A forestry graduate student is studying Dutch Elm disease in Texas. there are 1500 Elm trees in the graduate student's study. (Assume the trees were randomly chosen from around the state.) Of these trees, 17 (1.1%) had Dutch Elm disease (a) What are the subjects in this sample? All trees in Texas All 티m trees in Texas All diseased Elm trees in Texas The 17 diseased Elm trees The 1500 Elm trees in the study (b) What is the populatio n? choose the best answer All trees in Texas All Elm trees in Texas All diseased Elm trees in Texas The 17 diseased Elm trees O The 1500 Elm trees in the study c) What is (are) the variable(s)? The number 1.1% The 1.1% of Elm trees that were diseased All diseased Elm trees in Texas Whether or not a tree is an Elm tree OWhether or not an Elm tree had Dutch Elm disease

Answer 1

a. What are the subjects in this sample?
The 1500 Elm trees in the study

b.What is the population?
All Elm trees in Texas

c. What is the variable?
Whether or not an Elm tree had Dutch Elm diseases

d. What is the statistic of interest
The number 1.1%