.U'PE\" . A compan- manager claims that the mean number of items produced per shift is 145 with a standard deviation of 10. The supervisor believes each shift produces more than 145 items. In a sample of 25 shifts, the mean number of items produced was 15 0. Does each shift produce more than 145 items. Test at 0.01 level. The mean time before a certain headache remedy starts to work is 12 minutes with a standard deviation of 3. A new coating is used to help in swallowing the pill. A sample of 18 people using the pills with the new coating showed the mean time before it started to work was 14 minutes. Is there a dierence with the new coating? Test at a = 0.01. Find the P value for Exercise 1. Find the P value for Exercise 2. An ambulance compan, claims that it responds to emergencies in less than 10 minutes. A sample of 12 calls had a mean response time of 9.6 minutes with a sample standard deviation of 9. Test at 0.05 level