Auto pistons at wemming chung's plant in shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. from sample sizes of 10 pistons produced each day, the mean and the range of this diameter have been as follows: day mean bold x overbar (mm) range r (mm) 1 156.9 4.4 2 155.2 4.4 3 153.6 4.3 4 157.5 4.8 5 158.6 4.5 (a) what is the value of x double overbar?

Make or buy eastside company incurs a total cost of $120,000 in producing 10,000 units of a component needed in the assembly of its major product. the component can be purchased from an outside supplier for $11 per unit. a related cost study indicates that the total cost of the component includes fixed costs equal to 50% of the variable costs involved. a. should eastside buy the component if it cannot otherwise use the released capacity? present your answer in the form of differential analysis. use negative sign represent a net disadvantage answer; otherwise do not use negative signs with your answers. cost from outside supplier $answer variable costs avoided by purchasing answer net advantage (disadvantage) to purchase alternative $answer b. what would be your answer to requirement (a) if the released capacity could be used in a project that would generate $50,000 of contribution margin? use negative sign represent a net disadvantage answer; otherwise do not use negative signs with your answers.