the NHANES-Ill survey, the inçidence of urinary tract infections in adult women is 13,320n per year (13.32%). A dipstick nitride test for urinary tract infections has a sensitivity3. According to NHANES-IIper 100,000 womeof only 26.7% (roughly 4/ 15), and a specificity of 93.3% (roughly 14/15) (zaman et alsurvey, the ingidence of urinary t., 1998).A) Report and interpret the estimated positive predictive value (PPV) and negative predictivevalue (NPV) for this dipstick nitride test.predictedelieMegeti w933nugathveB)If the incidence of urinary tract infections decreased, which of the following would change dive(circle all values that would change)?negative predictive valuesensitivity specificity pasitive predictive valueits sensitivitý without changing its specificity, wouldC)羹the positive predictive value of the test increase or decrease? Explain your answer] If the manufacturers of the test increaseYes the positire of tni test would i nereaetvtrlstbecause they are dgtendontbecause, ther CrePA . %6681 1HaveTN+ FNTot

Given incidence of urinary tract infections = 13.32%Nitride test for urinary tract infections…

Answered: the NHANES-Ill survey, the inçidence of…

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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The chamber of commerce of a Florida Gulf Coast community advertises that area residential property is available at mean cost of $125,000 or less per lot. Suppose a sample of 41 properties provided a sample mean of $133,000 per lot and a population standard deviation of $13,000. Use a .1 level of significance to test the validity of the advertising claim.
Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 900 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy .) A study was conducted on a sample of 27 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean of 907 Gy , with a sample standard deviation of 17 Gy . Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that μ , the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 900…
Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 900 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy .) A study was conducted on a sample of 27 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean of 907 Gy , with a sample standard deviation of 17 Gy . Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that μ , the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 900…
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An LED light bulb manufacturer claims that the average lifespan of its 60-watt LED light bulbs is 43,000 hours.A corporate watchdog group is suspicious of the company's claim and thinks that the true average lifespan of the 60-watt LED light bulbs produced by the company may be less than the advertised 43,000 hours. The group collected and tested a random sample of 240 light bulbs and found the average lifespan of the sample was 42,958 hours.Use the p-value method to test the hypothesis that the mean lifespan of this brand of 60-watt LED light bulb is less than 43,000 hours, using α=0.025α=0.025. Assume the standard deviation of the lifespan of all such light bulbs is known to be 430 hours.State the null and alternative hypothesis for this test.H0:H0: H1:H1: Determine if this test is left-tailed, right-tailed, or two-tailed. right-tailed two-tailed left-tailed Should the standard normal (zz) distribution or Student's (tt) distribution be used for this…
the chamber of commerce of a florida gulf coast community advertises that area residential property is available at a mean cost of $125,000 or less per lot. Suppose a sample of 32properties provided a sample mean of $130,000 per lot and a sample standard deviation of$12,500. use a .05 level of significance to test the validity of the advertising claim.
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