2. In an experiment to study the relationship of hypertension and smoking habits, the following data arecollected for 180 individuals:NonsmokersModerate SmokersHeavy SmokersHypertension213630Nontveertension482619If one of these individuals is selected at random, find the probability that the person is,(a) Experiencing hypertension, given that the person is a heavy smoker;(b) A nonsmoker, given that the person is experiencing no hypertension.

Having high blood pressure, or hypertension means having a higher than normal blood pressure. As you…

Answered: 2. In an experiment to study the…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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 5th
Next Question Pt What do p, and p. represent? Pc The relative risk of a characteristic is the ratio Pt is the of some characteristic in the and pe is the of some characteristic in the
Suppose that in a senior college class of 500 students it is found that 210 smoke, 258 drink alcoholic beverages, 216 eat between meals, 122 smoke and drink alcoholic beverages, 83 eat between meals and drink alcoholic beverages, 97 smoke and eat between meals, and 52 engage in all three of these bad health practices. If a member of this senior class is selected at random, find the probability that the student eats between meals and drinks alcoholic beverages but does not smoke;
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?
A 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.
Joey 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?
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.
During a chlorination experiment of a secondary settling tank effluent, the results show that the same total chlorine residual in “mg/L as Cl2” was observed at three different free chlorine doses. Explain how it is possible for such a phenomenon to occur. Use figures when/if you deem it necessary.
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?
The gas mileages, in miles per gallon (mpg), of 10 randomly selected cars, both with and without a new gasoline additive, are shown in the following table. With additive Without additive 25.7 200 284 13.7 249 18.8 27.7 13.0 IKS 178 113 125 284 278 23.1 23.1 10.4 9.9 a. Apply the paired -test to decide, at the 5% significance level, whether the gasoline additive is effective in increasing gas mileage. b. Apply the pooled 1-test to the sample data to perform the hypothesis test. c. Compare your result in parts (a) and (b). c. Is performing the hypothesis test the way you did in part (b) appropriate or inappropriate? Whhy?
The residential drinking water in a small town with a population of 50,000 has been detected to contains 0.5 ppb tetrachloroethylene. There is also a waste incineration plant in the town that emits 0.001 ppb dioxin. Long-term health monitoring of the town yielded the following data: With Disease Without Disease Exposed 72 185 Not exposed 34 560 Show how to calculate the CDI values for the 2 contaminants: (CDI_TCE = 5.86x10-6 mg/kg/d, CDI_Dioxin = 1.17x10-8 mg/kg/d) Show how to calculate the number of cancers caused: 0.01 cases caused by TCE and 91 cases caused by Dioxin
4. Calculate the risk for a compound with toxicity dose of 10 ug/L, unit risk (RU) of 3.2 x 10-5 L/mg for a person exposed to it for 15 years with an total expected life 87 years.

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