To study the effect of workplace lighting on employee productivity, a researcher first manipulates the amount of lighting in a workspace and then observes its effect on a group's productivity. in this case, the researcher is focusing on which element of inferences of cause and effect?

Stock market crashes happen when the value of most of the stocks in the stock market increase at the same time. question 10 options: true false

Afirm plans to begin production of a new small appliance. the manager must decide whether to purchase the motors for the appliance from a vendor at $10 each or to produce them in-house. either of two processes could be used for in-house production; process a would have an annual fixed cost of $200,000 and a variable cost of $7 per unit, and process b would have an annual fixed cost of $175,000 and a variable cost of $8 per unit. determine the range of annual volume for which each of the alternatives would be best. (round your first answer to the nearest whole number. include the indifference value itself in this answer.)

What is the difference between the contractual interest rate and the market interest rate?