Percentage of Cooking Time 3.0 Hours Hardwood Pressure Concentration 400 500 650 196.6 197.7 199.8 196.0 196.0 199.4 4 198.5 196.0 198.4 197.2 196.9 197.6 8 197.5 195.6 197.4 196.6 196.2 198.1 Percentage of Cooking Time 4.0 Hours Hardwood Pressure Concentration 400 500 650 198.4 199.6 200.6 198.6 200.4 200.9 4 197.5 198.7 199.6 198.1 198.0 199.0 8 197.6 197.0 198.5 198.4 197.8 199.8 2.
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- 10) Integrated circuits consist of electric channels that are etched onto silicon wafers. A certain proportion of circuits are defective because of "undercutting", which occurs when too much material is etched away so that the channels, which consist of the unetched portions of the wafers, are too narrow. A redesigned process, involving lower pressure in the etching chamber, is being investigated. The goal is to reduce the rate of undercutting to less than 5%. Out of the first 1000 circuits manufactured by the new process, only 32 show evidence of undercutting. If someone asks you the question "Can you conclude that the goal has been met?", what is the p-value that you'll report? Round the answer to four decimal places.At noon time, customers arrive at Metrobank counter managed by a single cashier with mean arrival rate of 6 customers per hour. The cashier attends the customers on first come first served basis at 10 customers per hour.What is the waiting time of a customer in the system?Original claim: Half of cell phone owners have apple iPhones. Initial conclusion: Fail to Reject H0. Fill in the blanks to finish the conclusion: There enough evidence to the claim that most people own apple iPhones.
- Fertility Rates. From the U.S. Census Bureau, in the document International Data Base, we obtained data on the total fertility rates for women in various countries. Those data are presented on the WeissStats site. The total fertility rate gives the average number of children that would be born if all women in a given country lived to the end of their childbearing years and, at each year of age, they experienced the birth rates occurring in the specified year. Use the technology of your choice to decide whether total fertility rates for countries appear to be approximately normally distributed. Explain your answer.A study is run to evaluate the effectiveness of an exercise program in reducing systolic Ate blood pressure in patients with pre-hypertension. A total of 15 patients with pre- 12 hypertension enrolled in the study, and their systolic blood pressures are measured. Each patient then participated in an exercise training program where they learned proper techniques and execution of a series of exercises. Patients were instructed to do the exercise program three times per week for six weeks. After six weeks, systolic blood pressures were again measured, and data were recorded. This study sought to determine if there is a difference in systolic blood pressures after participating in the exercise program as compared to before. What is the most appropriate statistical test to be used to answer the research objectives? a. Spearman Correlation Coefficient b. Pearson Correlation Coefficient c. Wilcoxon Signed Ranks Test d. Mann-Whitney U TestWater Consumption The Old Farmer’s Almanac stated that the average consumption of water per person per day was 123 gallons. To test the hypothesis that this figure may no longer be true, a researcher randomly selected 16 people and found that they used on average 119 gallons per day and s = 5.3. At α = 0.05, is there enough evidence to say that the Old Farmer’s Almanac figure might no longer be correct? Use the Critical Value method.
- A manufacturing process produces auto tires. A sample of miles at replacement is recorded below. At what milage should the warranty be set at for warranty replacement of 0.5% of the tires? Mileage at Replacement 47391 49450 52700 42709 46753 42082 53801 43975 51014 47729 49942 45216 60679 46353 52155 51420 45398 57044 51170 52729 54830 53273 48308 50209 53397 47329 54888 52780 52883 45158 48575 46073 45900 49406 47717 53113 44880 49642 47241 54091 50185 47824 54659 49625 52670 56983 44403 52557 55324 52183Calculate the incidence rate of prostate cancer in this population A population of 200 healthy men was followed up for the development of prostate cancer. 10 men were followed-up for 1 year and were then lost to follow-up. After being followed-up for 5 years, 10 men developed prostate cancer. The remaining men who never developed prostate cancer were followed for 10 years.A campus deli serves 300 customers over a busy lunch period from 11:30 to 1:30pm. A quick count of the number of customers waiting in line and being served by the deli staff shows that an average of 15 customers are in the process of waiting at any point in time. What is the average amount of time that a customer spends in the deli process during this busy lunch period?
- True/False Censoring occurs when the event of interest (e.g., disease status) is observed on every individual, usually due to time constraints. The incidence rate (IR), is computed by taking the ratio of the number of new cases of disease to the total number of person-time units available. The prevalence of a disease depends on the incidence of the disease as well as the duration of the disease.One Sample Mean: II George plans to take simple random sample of size 50 from a population, and to compute the mean x-bar of the weights of the people in the sample. Unknown to George, the mean of the population is 145 and the SD of the population is 23. Using the normal-curve approximation from Central Limit Theorem, compute the approximate probability that x-bar will turn out to be more than 147 pounds. Write your answer as a decimal between 0 and 1, not as a percentage, and make sure that it is correct to at least two decimal places. __________________________________________Seeds A garden center wants to store leftover packetsof vegetable seeds for sale the following spring, but thecenter is concerned that the seeds may not germinate atthe same rate a year later. The manager finds a packetof last year’s green bean seeds and plants them as a test.Although the packet claims a germination rate of 92%,only 171 of 200 test seeds sprout. Is this evidence that theseeds have lost viability during a year in storage? Test anappropriate hypothesis and state your conclusion. Be surethe appropriate assumptions and conditions are satisfiedbefore you proceed.