Use two indicator (dummy) variables to code the forest. Let 'indicator2' be 1 for forest 2, and O otherwise, let 'indicator3' be 1 for forest 3 and 0 otherwise. With this coding, the logisitic regression model will use the intercept for forest 1, the intercept plus the coefficient of the first indicator variable for forest 2, and the intercept plus the coefficient of the second indicator variable for forest 3. Include at least 3 decimals of precision (a) Run the multiple logistic regression. Give the coefficient estimates here: log- odds(gambling) = "indicator2 + "indicator3 (b) What are the log-odds for tar spot in Forest 1? (c) What are the log-odds for tar spot in Forest 2? (d) What are the log-odds for tar spot in Forest 3?

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Author:Amos Gilat
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A survey of maple trees in three large forests was done to investigate the presence of Tar
Spot, a fungus that affects the leaves of maple trees. A summary of the survey is in the table
below.
Forest 1
Forest 2
Forest 3
Tar Spot
No Tar Spot
(Data in StatPowers)
90
65
83
459
237
311
Use two indicator (dummy) variables to code the forest. Let 'indicator2' be 1 for forest 2, and
O otherwise, let 'indicator3' be 1 for forest 3 and 0 otherwise. With this coding, the logisitic
regression model will use the intercept for forest 1, the intercept plus the coefficient of the
first indicator variable for forest 2, and the intercept plus the coefficient of the second
indicator variable for forest 3. Include at least 3 decimals of precision
(a) Run the multiple logistic regression. Give the coefficient estimates here: log-
odds(gambling) =
*indicator2 +
*indicator3
(b) What are the log-odds for tar spot in Forest 1?
(c) What are the log-odds for tar spot in Forest 2?
(d) What are the log-odds for tar spot in Forest 3?
> Next Question
Transcribed Image Text:A survey of maple trees in three large forests was done to investigate the presence of Tar Spot, a fungus that affects the leaves of maple trees. A summary of the survey is in the table below. Forest 1 Forest 2 Forest 3 Tar Spot No Tar Spot (Data in StatPowers) 90 65 83 459 237 311 Use two indicator (dummy) variables to code the forest. Let 'indicator2' be 1 for forest 2, and O otherwise, let 'indicator3' be 1 for forest 3 and 0 otherwise. With this coding, the logisitic regression model will use the intercept for forest 1, the intercept plus the coefficient of the first indicator variable for forest 2, and the intercept plus the coefficient of the second indicator variable for forest 3. Include at least 3 decimals of precision (a) Run the multiple logistic regression. Give the coefficient estimates here: log- odds(gambling) = *indicator2 + *indicator3 (b) What are the log-odds for tar spot in Forest 1? (c) What are the log-odds for tar spot in Forest 2? (d) What are the log-odds for tar spot in Forest 3? > Next Question
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