The upper and lower limits for diving ring diameters made by john's swimming co. are 40 and 39 cm., respectively. john took 11 samples with the following average diameters (39, 39.1, 39.2, 39.3, 39.4, 39.5 39.6, 39.7, 39.8, 39.9, 40). is the process in control?
a) yes, no diameters exceeded the control limits.
b) no, some diameters exceeded the control limits.
c) no, there is a distinguishable pattern to the samples.
d) no, the range is not in control.
e) there is not enough information to make a decision.

Solomon chemical company makes three products, b7, k6, and x9, which are joint products from the same materials. in a standard batch of 320,000 pounds of raw materials, the company generates 70,000 pounds of b7, 150,000 pounds of k6, and 100,000 pounds of x9. a standard batch costs $3,840,000 to produce. the sales prices per pound are $10, $14, and $20 for b7, k6, and x9, respectively. (a) allocate the joint product cost among the three final products using weight as the allocation base. (b) allocate the joint product cost among the three final products using market value as the allocation base. (c) allocate the joint product cost among the three final products using weight as the allocation base.