A concentration ratio a. measures the percentage of total output supplied by the four largest firms in the industry. b. reflects the level of competition in an industry. c. is related to the control that each firm has over price. d. All of the above are correct.

When a shortage or a surplus arises in the loanable funds market a. the supply of loanable funds changes to return the economy to its original real interest rate b. the nominal interest rate is pulled to the new equilibrium level c. the demand for loanable funds changes to return the economy to its original real interest rate d. the real interest rate is pulled to the new equilibrium level

Both a demand curve and a demand schedule show how a. prices affect consumer demand. b. consumer demand affects income. c. prices affect complementary goods. d. consumer demand affects substitute goods.

New process is run on consecutive mornings for five days and the yields and other performance data are recorded. when the process goes into full-scale operation, it will be run continuously 24 hours a day. is it reasonable to consider the yield and performance data from the five morning runs a simple random sample