A study was undertaken at Virginia Tech to determine if re

Chapter 1, Problem 9.92

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A study was undertaken at Virginia Tech to determine if re can be used as a viable management tool to increase the amount of forage available to deer during the critical months in late winter and early spring. Calcium is a required element for plants and animals. The amount taken up and stored in plants is closely correlated to the amount present in the soil. It was hypothesized that a re may change the calcium levelspresent in the soil and thus aect the amount available to deer. A large tract of land in the Fishburn Forest was selected for a prescribed burn. Soil samples were taken from 12 plots of equal area just prior to the burn and analyzed for calcium. Postburn calcium levels were analyzed from the same plots. These values, in kilograms per plot, are presented in the following table: Calcium Level (kg/plot) Plot Preburn Postburn 1 2 3 4 5 6 7 8 9 10 11 12 50 50 82 64 82 73 77 54 23 45 36 54 9 18 45 18 18 9 32 9 18 9 9 9Construct a 95% condence interval for the mean difference in calcium levels in the soil prior to and after the prescribed burn. Assume the distribution of dierences in calcium levels to be approximately normal.