We have three different drugs T, F and H. Drugs Tand F cure a V virus in 60% and 80% of cases,respectively, and drug H is entered by mistake inthe prescription and if it is administered to patientswith the V virus produces serious secondaryeffects in them without curing the virus. Assumethat the effects of the 3 drugs are independent.The treatment consists: first, one of the drugs israndomly administered. After a defined time, if it isnot cured, one of the remaining drugs is randomlyadministered; if it is not cured either, then the thirdof the drugs is administered. In addition, in theface of serious side effects caused by H, thetreatment is interrupted, that is, no otherprescription is administered. What is theprobability that the patient will be cured of the Vvirus?

Given Information: There are three drugs T, F and H. Drug T cures virus V in 60% of cases. Drug F…

Answered: We have three different drugs T, F and…

Linear Algebra: A Modern Introduction

4th Edition

ISBN:9781285463247

Author:David Poole

Publisher:David Poole

Chapter2: Systems Of Linear Equations

Section2.4: Applications

Problem 28EQ

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2. Suppose that in Example 2.27, 400 units of food A, 500 units of B, and 600 units of C are placed in the test tube each day and the data on daily food consumption by the bacteria (in units per day) are as shown in Table 2.7. How many bacteria of each strain can coexist in the test tube and consume all of the food? Table 2.7 Bacteria Strain I Bacteria Strain II Bacteria Strain III Food A 1 2 0 Food B 2 1 3 Food C 1 1 1
Find the equation of the regression line for the following data set. x 1 2 3 y 0 3 4
Two separate samples are selected from the same population. Each have an n=8. Both samples receive a different treatment. After the treatment, the first sample has SS=16 and the second sample has SS=24. c. Calculate the estimated d AND r2
A pharmaceutical company conducts an experiment to test the effect of a new cholesterol medication. The company randomly selects 5 subjects and assigned to each of three treatment groups. Within each treament group, subjects receive a different dose of the new medication. After 30 days, doctors measure the cholesterol level of each subject. The within groups degrees of freedom is: A. 5 В. 2 C. 12 D. 14 A. В D Answer
Let A = PDP - 1 and P and D as shown below. Compute A*. 1 2 2 0 P = D = 2 3 0 3 ... %3D (Simplify your answer.)
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A drug company creates a medicine designed to prevent colds, and states that it is equally effective for men and women. To test this claim, they give the medicine to 100 men and 200 women. At the end of the study, 33 men and 95 women caught a cold. Can we say that the drug is equally effective for men and women? (Use α = .01)
A nutritionist randomly divided 15 cyclists into three groups of 5 cyclists each. Cyclists in the first group were given vitamin supplements, which they took with their meals for the next three weeks. The second group was instructed to eat certain types of high-fiber whole grain cereals for the next three weeks. Cyclists in the third group ate the same way they normally eat. After three weeks, each cyclist rode 6 miles, from which the following times were recorded: Vitamin group 15.6 16.4 17.2 15.5 16.3 Fiber group 17.1 16.3 15.8 16.4 16.0 Control group 15.9 17.2 16.4 15.4 16.8 Is the data consistent with the hypothesis that vitamin supplements or fiber cereals do not affect the speed of cyclists? Use a 1% significance level.
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One of the markers of toxicity of a proposed drug during drug development is loss of weight in the exposed individuals. Female was exposed to a proposed drug and the effects were observed during a 28 days period. Another record only the vehicle. These two groups were animals of similar age and gender and were all treated in similar ways regarding nutrition, water and environment. Result of the weight of 16 male mice before and after treatment are tabulated in table 2 below: Table 2: Table of the weights (gm) of 16 male mice before (X1a) and after treatment (X1b) X1a 20 21.2 20.6 19.5 18.9 20.2 21 19.6 17.8 18.5 18.3 19.2 19.6 19.4 19.2 19 X1b 20.9 21.9 21.2 21 19.9 20.9 21.8 21 18.6 19.9 19 20 20.1 20 20 20.7 Determine if these was a statistical weight difference (gain/loss in the 2 groups) Using paired t-test
An experiment was performed with three treatments (A, B, and C). Which of the following is a correct model with a categorical explanatory variable with three categories? yˆ = a +bx where x = 0 if in treatment A, x = 1 if in treatment B, and x= 2 if in treatment C yˆ = a +bxA + cxB + dxC where xA = 1 if in treatment A, and = 0 if not in treatment A xB = 1 if in treatment B, and = 0 if not in treatment B xC = 1 if in treatment C, and = 0 if not in treatment C yˆ = a + bxA + cxB where xA = 1 if in treatment A, and = 0 if not in treatment A xB = 1 if in treatment B, and = 0 if not in treatment B

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