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An Analyst Examines the Effect That Various Variables Have on Crop

question 40

Essay

An analyst examines the effect that various variables have on crop yield.He estimates where y is the average yield in bushels per acre,x₁ is the amount of summer rainfall,x₂ is the average daily use in machine hours of tractors on the farm,and x₃ is the amount of fertilizer used per acre.The results of the regression are:
A)Predict the crop yield per acre if x₁ is 5,x₂ is 4,and x₃ is the 0.5.
B)Calculate the standard deviation of the difference between the actual crop yield and the estimate of the crop yield.
C)How much of the variation in crop yield is unexplained by the model?

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Definitions:

Twin Studies

Research that compares the similarity between monozygotic (identical) and dizygotic (fraternal) twins to understand genetic and environmental influences.

Fraudulent Results

Deliberately manipulated data or findings presented as genuine in research or reports.

Changed Data

The modification or alteration of data after it has been collected, which can affect the results or conclusions of a study or analysis.

Hypotheses Support

The extent to which research findings are consistent with the predictions made by a hypothesis.