Current (Y) Proposed (X) Current (Y) Proposed (X) 3.0 3.1 3.1 3.1 3.1 3.9 2.7 2.9 3.0 3.4 3.3 3.6 3.6 4.0 3.2 4.1 3.8 3.6 2.1 2.6 2.7 3.6 3.0 3.1 2.7 3.6 2.6 2.8 Co
At a hydrocarbon processing factory, process control involves the periodic analysis of samples for a certain process quality parameter. The analytic procedure currently used is costly and time-consuming. A faster and more economical alternative procedure has been proposed. However, the numbers for the quality parameter given by the alternative procedure
are somewhat different from those given by the current procedure, not because of any inherent errors but because of changes in the nature of the chemical analysis. Management believes that if the numbers from the new procedure can be used to
a. Use linear regression to find a relation to forecast Y, which is the quality parameter from the current procedure, using the values from the proposed procedure, X.
b. Is there a strong relationship between Y and X? Explain
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