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.

Suppose jamal purchases a pair of running shoes online for $60. if his state has a sales tax on clothing of 6 percent, how much is he required to pay in state sales tax?

conquest, inc. produces a special kind of light-weight, recreational vehicle that has a unique design. it allows the company to follow a cost-plus pricing strategy. it has $9,000,000 of average assets, and the desired profit is a 10% return on assets. assume all products produced are sold. additional data are as follows: sales volume 1000 units per year; variable costs $1000 per unit; fixed costs $4,000,000 per year; using the cost-plus pricing approach, what should be the sales price per unit?

You decide to invest in a portfolio consisting of 25 percent stock a, 25 percent stock b, and the remainder in stock c. based on the following information, what is the expected return of your portfolio? state of economy probability of state return if state occurs of economy stock a stock b stock c recession .16 - 16.4 % - 2.7 % - 21.6 % normal .55 12.6 % 7.3 % 15.9 % boom .29 26.2 % 14.6 % 30.5 %