A regression model relating units sold (y), price (x1), and whether or not promotion was used (x2 = 1 if promotion was used and 0 if it was not) resulted in the following model. 
= 120 - 0.03x1 + 0.7x2
and the following information is provided.n = 15 Sb1 = .01 Sb2 = 0.1
a.Is price a significant variable?
b.Is promotion significant?
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A contractual arrangement in which an insurer agrees to compensate an insured for loss, damage, or liability in return for payment of a premium.
Electronic Eligibility Features
Digital tools or systems used by healthcare providers to verify a patient's insurance coverage and benefits.
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Financial compensations provided typically through insurance or workers' compensation for individuals who cannot work and earn an income due to a disability or injury.
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A condition where an individual is protected under an insurance policy that provides income in the case they are unable to work due to a disability.
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