If the error term in a linear regression model is not normally distributed, we cannot give the estimated coefficients a causal interpretation. a. true
b. false

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.