In a cohort of 5,000 individuals, ages 40-50 years of age, blood samples were collected at baselineand stored for future analysis. After five years of study, Vitamin D levels were determined amongthose who developed Multiple Sclerosis (MS) and those who did not develop MS. The followingresults were observed.Serum Level of Vitamin DHealthyIncident Cases of MSEntire CohortIndividualsAbove 40 ng per ml1998200020-40 ng per ml419962000Below 20 ng per ml49961000If Vitamin D assays cost $20 per specimen, what is the total cost of these assays in the cohort studyO $ 100.000O $ 50,000O $ 10,000O $ 20,0002.

Answered: Image /qna-images/answer/21de5bc4-32a0-4c35-8b65-af8bed9b51f4.jpg

Answered: In a cohort of 5,000 individuals, ages…

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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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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