A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the
Question:
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is currently producing has a normal distribution with a mean of 7.4 minutes with a standard deviation of 1.2 minutes. The chemistry of the new anesthetic is such that the effective time should be normally distributed with the same standard deviation, but the mean effective time may be lower. If it is lower, the drug company will market the new anesthetic; otherwise, they will continue to produce the older one. A sample of size 36 results in a sample mean of 7.1. A hypothesis test will be done to help make the decision. SCENARIO 9-4 | |
18 | Referring to Scenario 9-4, the appropriate hypotheses are A) H0: μ ≤ 7.4 versus H1: μ > 7.4. B) H0: μ > 7.4 versus H1: μ ≤ 7.4. C) H0: μ = 7.4 versus H1: μ ≠ 7.4. D) H0: μ ≥ 7.4 versus H1: μ < 7.4. |
19 | True or False: Referring to Scenario 9-4, the null hypothesis will be rejected with a level of significance of 0.10. A) True B) False |
20 | True or False: Referring to Scenario 9-4, if the level of significance had been chosen as 0.05, the null hypothesis would be rejected. A) True B) False |
21 | 21) True or False: Suppose, in testing a hypothesis about a mean, the p-value is computed to be 0.043. The null hypothesis should be rejected if the chosen level of significance is 0.05. 21) ______ A) True B) False |
