Day 11 Daily 2-Factor Anova

A problem with a phone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telecommunications company. The file Phone contains samples of 20 problems reported to two different offices of a telecommunications company and the time to clear these problems (in minutes) from the customers’ lines:  Central Office I Time to Clear Problems (minutes)  1.48  1.75  0.78  2.85  0.52  1.60  4.15  3.97  1.48  3.10  1.02  0.53  0.93  1.60  0.80  1.05  6.32  3.93  5.45  0.97     Central Office II Time to Clear Problems (minutes)  7.55  3.75  0.10  1.10  0.60  0.52  3.30  2.10  0.58  4.02  3.75  0.65  1.92  0.60  1.53  4.23  0.08  1.48  1.65  0.72  Perform a hypothesis test to determine if there’s evidence in this data of a difference in the mean waiting time between the two offices by answering the following questions:                                                                                                (b) Assuming that the population…

5. Frustrated passengers, congested streets, time schedules, and air and noise pollution are just some of the physical and social pressures that lead many urban bus drivers to retire prematurely with disabilities such as coronary heart disease and stomach disorders. An intervention program was implemented to improve the work conditions of the city’s bus drivers. The following table reported the heart rates, in beats per minute, of the drivers who drove on the improved routes (intervention) and the drivers who drove on the normal routes (control). a) Is it reasonable to apply the pooled two-sample ? test? Justify your answer b) At the 5% significance level, do the data provide sufficient evidence that the intervention program reduces mean heart rate of urban bus drivers? c) Obtain a confidence interval for the difference between the mean heart rates of urban bus drivers in the two environments corresponding to the hypothesis test in part (a)  d) Interpret the confidence interval…

You are in charge of quality control for a company that manufactures a famous luxury brand ofhandbags. There are three different defects that you must be on the lookout for. A defect in any ofthese areas means the handbag cannot be sold and must be either recycled or destroyed.• Defects in stitching: 11% of items• Defects in coloring: 8% of items• Defects in materials: 4% of itemsBecause the areas (stitching, coloring/dying, materials) are done by different suppliers or in differentareas of the manufacturing plant, you may assume that the types of defects are independent of eachother.1. If there is a defect in all of the areas, the product must be destroyed. What percentage of bagswill need to be destroyed?2. A defect in coloring or materials means the product cannot be recycled and must therefore bedestroyed. For what percentage of bags will this be the case?3. What is the probability that a defect will be found of any of the three types?

menthol cigarettes. A factor in this decision was US data on smoking which shows that 40% of people who did not finish high school smoke cigarettes, 34% of high school graduates smoke cigarettes, 24% of individuals with some college education smoke cigarettes, and 14% of college graduates smoke cigarettes. We also know from the statistics provided by the Education Department that 10.55% of the population did not finish high school, 32.36% of the population are high school graduates, 18.47% of the population have some college education, and 38.62% of the population are college graduates. In announcing his plan for banning cigarettes, President Biden invites a random individual to the White House to discuss his plan. After the individual arrives at the White House, it is discovered that the individual is a smoker. What is the probability that the individual is a college graduate? Answer: .044

6 ut of Allied Laboratories is combing some of its most common tests into one-price packages. One such package will contain three tests that have the following variable costs: Test A Test B Test C Disposable Syringe $4.00 $4.00 $4.00 Blood Vial $0.50 $0.50 $0.50 Forms $0.15 $0.15 $0.15 Reagents $0.80 $0.60 $1.20 Sterile Bandages $0.20 $0.20 $0.20 Breakage/losses $0.05 $0.05 $0.05 When the tests are combined, only one syringe, form, and sterile bandage will be used. Furthermore, only one charge for breakage/losses will apply. However, you will need three blood vials and three individual reagents (pay attention to the price of the regents). Assuming marginal cost pricing, what is the cost of the combined test? Select one or more: a. $8.50 O b. $8.00 O c. $6.90 O d. $4.50