1 ) A production line is designed to fill soft drink cans to a mean weight of 12 ounces. A sample of cans is periodically selected and weighed to determine whether underfilling or overfilling is occurring. If the sample leads to a conclusion of underfilling or overfilling, the production line will be shut down and adjusted. A sample of 30 cans showed a mean of 10 ounces. Based on prior experience, a population standard deviation of 5 ounces can be used. A 0.05 level of significance is useful. What is the value of critical Z in this case? A) -1.64 B) -1.96 C) -1.88 D) -2.30 E) none of the above 2) the value of calculated Z in this case is A) -0.40 B) -1.64 C) -1.96 D) -2.19 E) -2.30 3) what is the hypothesis test conclusion? Should the line be shut down for adjustments? A) reject Ho. The line should be shut down for adjustments. B) reject Ho. The line should not be shut down for adjustments. C) do not reject Ho, the line should not be shut down for adjustments. D) do not reject Ho. The line should be shut down for adjustments. E) the test is inconclusive. No decision can be made