The manager of a fast food restaurant wants to determine how sales in a given week are related to the number of discount vouchers (#) printed in the local newspaper during the week. The number of vouchers and sales ($000s) from 10 randomly selected weeks is given below with the predicted sales. 
Compute the standardised residuals.
Definitions:
Modifies Action
An adjustment or change in behavior or approach to achieve a desired outcome more effectively.
Synergistic Effect
The interaction of multiple elements that produces a total effect greater than the sum of individual effects.
Toxic Effects
The harmful and potentially dangerous side effects caused by substances, chemicals, or medications when ingested, inhaled, or absorbed.
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