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Figure 3.8 Graphing the model with b1 = 0: y = b0 + e

Figure 3.8 Graphing the model with b1 = 0: y = b0 + e

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Figure 3.9 Sampling distribution of

^

β1



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Figure 3.10 Rejection region and

calculated t-value for testing whether the

slope β1 = 0



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Figure 3.11 SAS printout for

advertising-sales regression



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Section 3.7

The

Coefficient of

Correlation



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Figure 3.12a&b Values of r and

their implications



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Figure 3.12c&d Values of r and

their implications



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Figure 3.8 Graphing the model with b1 = 0: y = b0 + e

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