Answer the following questions. 1. An instructor gives his class an achievement test which, as he...

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Answer the following questions. 1. An instructor gives his class an achievement test which, as he knows from years of experience, yields a mean -85, His present class of 25 obtain a mean of 87 and a standard deviation of 5. He now claims that his present class is a superior class. Is he correct in his claim if his significance level is 0.05? Step 1: Step 2: Step 3: Step 4: Step 5: Step 6: 2. A business owner is in the process of deciding whether or not to invest in a new factory that refines oil in order to meet the high demand for that commodity. A test showed that the old factory refines oil at a mean rate of 3.1L per second at a standard deviation of 1.0 using a sample size of 40. The new factory was measured to refine oil at a mean rate of 3.8L per second at a standard deviation of 1.5 using a sample size of 36. Determine if there is a major difference at 10% significance level. Step 1: Answer the following questions. 1. An instructor gives his class an achievement test which, as he knows from years of experience, yields a mean -85, His present class of 25 obtain a mean of 87 and a standard deviation of 5. He now claims that his present class is a superior class. Is he correct in his claim if his significance level is 0.05? Step 1: Step 2: Step 3: Step 4: Step 5: Step 6: 2. A business owner is in the process of deciding whether or not to invest in a new factory that refines oil in order to meet the high demand for that commodity. A test showed that the old factory refines oil at a mean rate of 3.1L per second at a standard deviation of 1.0 using a sample size of 40. The new factory was measured to refine oil at a mean rate of 3.8L per second at a standard deviation of 1.5 using a sample size of 36. Determine if there is a major difference at 10% significance level. Step 1: