Helen knows that anemic causes yellow skin 53% of the time. Prior probability of any patient that is anemic is 1/60,000. Prior to probability of any patient that have yellow skin is 1/25. If a patient has yellow skin, what is the probability that he or she is anemic?
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Helen knows that anemic causes yellow skin 53% of the time. Prior probability of any patient that is anemic is 1/60,000. Prior to probability of any patient that have yellow skin is 1/25. If a patient has yellow skin, what is the probability that he or she is anemic?
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- During an initial phase of an outbreak of COVID-19, the number of infections can grow geometrically. If there were 4, 8, 16, ... on the first three days, how many will be infected on 6th day? Complete the table below. Show your Solution. Days Number of People Infected 1st 2nd 3rd 5thJoey says he is itchy. There is a test for allergy to cats, but this test is not alwaysr ight. For people that really do have the allergy, the test says yes 85% of the time. For people that do not have the allergy, the test says yes 15% of the time. If 1% of the population have the allergy and Joey's test says yes, what are the chances that hunter really has the allergy?A health study concluded that following 7 simple health rules can extend a human’s life by 7-11 years on the average. These 7 rules are as follows: no smoking, get regular exercise, use alcohol only in moderation, get 7 to 8 hours of sleep, maintain proper weight, eat breakfast, and do not eat between meals. In how many ways can a person adopt 5 of these rules,a. If the person presently violates all 7 rules?b. If the person never drinks and always eats breakfast?
- Civil Engineering A woman weighing 78 kg drinks 2 liters per day of water that contains 5 mg/L of Contaminant X. If she drinks this water for 70 years and the cancer slope factor of Contaminant X is 0.67 kg-day/mg, determine the cancer risk from this exposure.1. Out of 300 workers in a plant manufacturing Gen-X, 23 developed liver cancer. A control group consisting of individuals with smoking histories similar to the plant workers, and who were unlikely to have encountered Gen-X, had 35 with liver cancers and 510 who did not develop liver cancer. What is relative risk, attributable risk, and odd ratio? 2 TheExample: A product developer is interested in reducing the drying time of a primer paint. Two formulations of the paint are tested; formulation 1 is the standard chemistry, and formulation 2 has a new drying ingredient that should reduce the drying time. From experience, it is known that the standard deviation of drying time is 8 minutes, and this inherent variability should be unaffected by the addition of the new ingredient. Ten specimens are painted with formulation 1, and another 10 specimens are painted with formulation 2; the 20 specimens are painted in random order. The two sample average drying times are 121 minutes and 112 minutes, respectively. What conclusions can the product developer draw about the effectiveness of the new ingredient, using a-0.05?
- A concern to public health officials is whether a concentration of lead in the paint of older homes may have an effect on the muscular development of young children. In order to evaluate this phenomenon, a researcher exposed 90 newly born mice to paint containing a specified amount of lead. The number of Type 2 fibers in the skeletal muscle was determined 6 weeks after exposure. The mean number of Type 2 fibers in the skeletal muscles of normal mice of this age is 21.7. Ninety (90) mice yielded mean and standard deviation values of Type 2 fibers in their muscles as18.8 and 15.3, respectively. a. Please calculate the level of significance of statistical test b. Is there significant evidence in the data to support the hypothesis that the mean number of Type 2 fibers is different from 21.7 using an α = 0.05 testIn the same venturi meter described below used to measure the discharge for a length of pipeline that was suspected to have had water stolen through an illegal connection before said suspected illegal connection a mercury difference of 350 mm was observed while a mercury difference of 200 mm was observed afterwards. estimate the stolen volume of water per dayIn a horizontally held injection syringe, the piston of 0.2 cm² cross-sectional area is pushed at a constant speed of 1.0 cm/s to eject water into the atmosphere through a hypodermic needle of 0.07 mm² cross-sectional area while rinsing. Neglecting losses, the force required to move the piston is nearly:
- The lithium concentration in serum taken from a patient being treated with lithium for manic-depressive illness was analyzed using flame emission spectroscopy. A sample of the serum gave a reading of 284 units for the intensity of the 671 nm red emission line. Then, 1.00 mL of a 11.1 mM lithium standard was added to 9.00 mL of serum. This spiked serum gave an intensity reading of 645 units at the 671 nm emission line. What is the original concentration of Lit in the serum? [Lit) = mMA step-dose tracer test was conducted on the clear well of a water treatment plant. A constant fluoride dosage of 2.0 mg/l was added at the inlet starting at time zero, and the fluoride concentrations in the outflow were measured and recorded every 5 or 10 min as listed in the following table. Calculate the C/C0 values, plot C/C0 versus t, and determine t10. (Answer t10 = 22 min) HINT: For 7-59, after you plot C/Co vs. time with Co = 2.0 mg/L, to find t10 you look for the value C/Co = 0.1 and this determines t10 on the graph. t10 is the length of time for 10% of the water entering the tank to discharge from the tank. This time is determined by tracer studies.You are in an old spy movie, and have been locked into a small room (volume 1000 ft). You suddenly realize that a poison gas has just started entering the room through a ventilation duct. Recognizing the type of poison from its smell, you know that if the gas reaches a concentration of 100 mg/m, you will die instantly, but that you are safe as long as the concentration is less than 100 mg/m. If the ventilation air flow rate in the room is 100 ft/min and the incoming gas concentration is 200 mg/m, how long do you have to escape?