Native Americans Were Able to Prevent the Encroachment of Trees

question 69

Multiple Choice

Native Americans were able to prevent the encroachment of trees and maintain the tallgrass prairies by

• A) establishing an extensive irrigation system to increase soil moisture, thus favoring grasses.
• B) restricting the migrations of bison, which caused the bison to browse heavily on tree seedlings and thus kill them.
• C) setting fires periodically to kill the trees.
• D) plowing much of the land for agriculture.
• E) clear-cutting the forests for timber and fuel.

Understand the measures of relationship between variables (correlation).

Calculate and interpret coefficients of variation, skewness, and kurtosis as measures of relative dispersion, asymmetry, and peakedness of distributions respectively.

Understand the difference between accrual and cash bases of accounting.

Recognize the importance of adjusting entries in the preparation of financial statements.

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