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1.8. In Figure 1.6, suppose arotherV observation is obtained at X-45 would E(Y) for this new observation still be 1047 Would the Y value for this new case again be 1087

FIGURE 1. Illustration of Simple Linear Regression Model (1.1). Y-108 100 EY)-104 )-9.5 2.1x 25 45 Number of Bids Prepared

1.3. Experience with a certain type of plastie indicates that a relation exists between the hardness (measured in Brinell units) of items molded from the plastic () and the elapsed time since ter- mination of the molding process (X). It is proposed to study this relation by means of regression analysis. A participant in the discussion objects, pointing out that the hardening of the plastic is the result of a natural chemical process that doesnt leave anything to chance, so the relation must be mathematical and regression analysis is not appropriate. Evaluate this objection

math   Statistics-And-Probability   
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