Evidence Supports Using a Simple Linear Regression Model to Estimate

question 113

Essay

Evidence supports using a simple linear regression model to estimate a person's weight based on a person's height. Let x be a person's height (measured in inches) and y be the person's weight (measured in pounds). A random sample of eleven people was selected and the following data recorded: The following output was generated for the data: Based on the scatterplot above, does a simple linear regression model seem appropriate?
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Justify your answer.
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Use the printout to find the least-squares prediction line. = ______________
Based on the printout, do there appear to be any outliers in the data?
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Justify your answer.
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Consider the following residual plot of the residuals versus the fitted values. What conclusion, if any, can be drawn from the plot?
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Consider the following normal probability plot of the residuals. What conclusion can be drawn from the plot?
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Based on the previous two plots, should you use the model in the computer printout to predict weight?
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Justify your answer.
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Definitions:

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