Data Analysis: Biology To estimate the amount of defoliation caused by the gypsy moth

Chapter 3, Problem 69

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Data Analysis: Biology To estimate the amount of defoliation caused by the gypsy moth during a given year, a forester counts the number of egg masses on of an acre (circle of radius 18.6 feet) in the fall. The percent of defoliation the next spring is shown in the table. (Source: USDA, Forest Service) A model for the data is given by (a) Use a graphing utility to create a scatter plot of the data and graph the model in the same viewing window. (b) Create a table that compares the model with the sample data. (c) Estimate the percent of defoliation if 36 egg masses are counted on acre. (d) You observe that of a forest is defoliated the following spring. Use the graph in part (a) to estimate the number of egg masses per acre.

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