The following materials standards have been established for a particular product: Standard quantity per unit of output 4.5 pounds Standard price $ 13.30 per pound The following data pertain to operations concerning the product for the last month: Actual materials purchased 4,950 pounds Actual cost of materials purchased $ 62,980 Actual materials used in production 4,450 pounds Actual output 710 units The direct materials purchases variance is computed when the materials are purchased. What is the materials quantity variance for the month?

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i.e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i.e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.