Avariable such as z, whose value is z = x1x2, is added to a general linear model in order to account for potential effects of two variables x1 and x2 acting together. this type of effect is

a. called interaction.
b. called multicollinearity effect.
c. one of the transformation effects.
d. impossible to occur.

Ursus, inc., is considering a project that would have a five-year life and would require a $1,650,000 investment in equipment. at the end of five years, the project would terminate and the equipment would have no salvage value. the project would provide net operating income each year as follows (ignore income taxes.):

Miller company’s most recent contribution format income statement is shown below: total per unit sales (20,000 units) $300,000 $15.00 variable expenses 180,000 9.00 contribution margin 120,000 $6.00 fixed expenses 70,000 net operating income $ 50,000 required: prepare a new contribution format income statement under each of the following conditions (consider each case independently): (do not round intermediate calculations. round your "per unit" answers to 2 decimal places.) 1. the number of units sold increases by 15%.

Bruce matthews played football for the tennessee titans. as part of his contract, he agreed to submit any dispute to arbitra- tion. he also agreed that tennessee law would determine all matters related to workers' compensation. after matthews retired, he filed a workers' compensation claim in california. the arbitrator ruled that matthews could pursue his claim in california but only under tennessee law. should this award be set aside?