State the null and alternate hypotheses.Ho: P1 = P2H: P1> P2This hypothesis test is a right-tailedtest.Part 2 of 5Find the critical value(s). Round the answer(s) to two decimal places. If there is more than one critical value, separate them with commas.Critical value(s): 2.326Part: 2 /5Part 3 of 5Compute the test statistic. Round the answer to two decimal places.385.67MusicDEC Preventing heart attacks: Medical researchers performed a comparison of two drugs, clopidogrel and ticagrelor, which are designed to reduce the risk of heartattack or stroke in coronary patients. A total of 6650 patients were given clopidogrel, and 6710 were given ticagrelor. Of the clopidogrel patients, 650 suffered aheart attack or stroke within one year, and of the ticagrelor patients, 580 suffered a heart attack or stroke. Can you conclude that the proportion of patientssuffering a heart attack or stroke is less for ticagrelor? Let p, denote the proportion of patients suffering a heart attack or stroke with clopidogrel and p, denotethe proportion of patients suffering a heart attack or stroke with ticagrelor. Use the a=0.01 level of significance and the critical value method.Part 1 of 5State the null and alternate hypotheses.Ho: P1= P2H: P1> P2This hypothesis test is a right-tailedtest.Part 2 of 5Find the critical value(s). Round the answer(s) to two decimal places. If there is more than one critical value, separate them with commas.Critical value(s): 2.326Microsoft PowenPart: 2 /5DEC6....DDF10

Given : x1= 650.0 n1= 6650 x2= 580.0 n2= 6710 significance level, 0.01

Answered: Preventing heart attacks: Medical…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Five hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of Lyme disease among clinic attendees is 10%. Calculate the predictive value of a positive test.
Suppose we are interested in the risk of peripheral neuropathy among persons with diabetes. To study this relationship, we identify 100 persons with a history of diabetes. At an initial examination, three of those 100 persons were found to have peripheral neuropathy. Five years later, the group was reexamined and 12 additional persons were found to have peripheral neuropathy. Based on that information, which of the following is closest to the five- year risk of peripheral neuropathy in this group of patients? А. О.03 В. О.07 С. О.12 D. 0.15 E. 0.17
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You are concerned that nausea may be a side effect of Tamiflu, but you cannot just give Tamiflu to patients with the flu and say that nausea is a side effect if people become nauseous. This is because nausea is common for people who have the flu. From past studies you know that about 34% of people who get the flu experience nausea. You collected data on 1926 patients who were taking Tamiflu to relieve symtoms of the flu, and found that 711 experienced nausea. Use a 0.01 significance level to test the claim that the percentage of people who take Tamiflu for the relief of flu symtoms and experience nausea is greater than 34%. a) Identify the null and alternative hypotheses? Ho: ? H₁: ? b) What type of hypothesis test should you conduct (left-, right-, or two-tailed)? left-tailed right-tailed O two-tailed c) Identify the appropriate significance level. d) Calculate your test statistic. Write the result below, and be sure to round your final answer to two decimal places. e) Calculate your…
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It has been observed that some persons who suffer renal failure, again suffer renal failure within one year of the first episode. This is due, in part, to damage from the first episode. The performance of a new drug designed to prevent a second episode is to be tested for its effectiveness in preventing a second episode. In order to do this two groups of people suffering a first episode are selected. There are 55 people in the first group and this group will be administered the new drug. There are 75 people in the second group and this group will be administered a placebo. After one year, 10% of the first group has a second episode and 9% of the second group has a second episode. Conduct a hypothesis test to determine, at the significance level 0.01, whether there is reason to believe that the true percentage of those in the first group who suffer a second episode is different from the true percentage of those in the second group who suffer a second episode? Select the [Alternative…
In one study, researchers at McGill University recruited127 people with high cholesterol and split them into twogroups. One took a probiotic supplement twice a dayfor nine weeks, while the second group took a placebo.The probiotic group saw their total cholesterol drop by 9 percent and their LDL, or “bad cholesterol,” fall almost12 percent. In a different study, conducted in Britain,80 volunteers “were given probiotics for six weeks andthen switched, later on, to a placebo. That study found nodifference in cholesterol levels when the subjects took thesupplement versus the dummy pills.”Which of the following is true: a) The McGill study is a controlled randomized experi-ment, while the British study is an observational study. b) The McGill study is a completely randomized ex-periment, while the British study is a matched pairs experiment.c) The results from the McGill study are more validbecause it includes blinding while the British studydoes not.d) We have reason to believe that the…
Medical researchers performed a comparison of two drugs, clopidogrel and ticagrelor, which are designed to reduce the risk of heart attack or stroke in coronary patients. A total of 6665 patients were given clopidogrel, and 6740 were given ticagrelor. Of the clopidogrel patients, 651 suffered a heart attack or stroke within one year, and of the ticagrelor patients, 573 suffered a heart attack or stroke. Can you conclude that the proportion of patients suffering a heart attack or stroke is less for ticagrelor? Let p1 denote the proportion of patients suffering a heart attack or stroke with clopidogrel and p2 denote the proportion of patients suffering a heart attack or stroke with ticagrelor. Use the =α0.01 level of significance and the P -value method with the TI-84 Plus calculator. please state p method clearly!
Researchers suspect that drinking tea might enhance the production of interferon gamma, a molecule that helps the immune system fight bacteria, viruses, and tumors. A recent study involved 20 healthy people who did not normally drink tea or coffee. Ten of the participants were randomly assigned to drink five cups of tea a day, while 10 were asked to drink the same amount of coffee. After two weeks, blood samples were exposed to an antigen and production of interferon gamma were measured. The results are shown in the following table: Теа: 55 17 54 49 10 46 21 14 53 Coffee: 16 12 20 52 37 15 22 30 3 Let X ~ N(ux,o3) be the interferon gamma production for participants who drink tea and observations for the ten participants who drink tea are a random sample from X. Let Y ~ N(uy,o) be the interferon gamma production for participants who drink coffee and observations for the ten participants who drink coffee are a random sample from Y. Some R output that may help. > p1 qnorm(p1) [1] -2.326…
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Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause people to become sensitized. Once an individual is sensitized, continued exposure can result in chronic beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium, workers were categorized by their duration of exposure (in years) and by their disease status (diseased, sensitized, or normal). The results were as follows: Duration of Exposure <1 1 to <5 ≥5 Diseased 14 13 18 Sensitized 11 20 15 Normal 78 140 209 Test the hypothesis of independence. Use the a=0.10 level of significance and the P-value method with the TI-84 Plus calculator. What do you conclude? State the null and alternate hypotheses.

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