12. We select a group of 1,000 middle-aged volunteers without kidney disease who are likelyto suffer from insomnia/anxiety. We assign them randomly into two groups. Group 1 istold to live their lives as normal and take any meds proscribed by their doctor. Group 2 istold not to use BZDS for 2 years, and doctors prescribe Group 2 with natural alternativesto BZDS. After those 2 years, we follow them up and check to see who developed kidneydisease in each group, and compare the groups.13. We will get the age-adjusted incidence rates of kidney disease in 30 different countriesJand compare those with the rates of BZD consumption per capita (total usage in country/total population of that country). We will then check to see if there is a correlationbetween the BZD consumption and kidney disease.14. In 2010, we examined the medical records of 2,000 patients ages 53+ associated withKaiser Permanente (large health care organization) who did NOT have kidney disease in2005. Then, we look back in the records to see who took BZDS from 2000-2005. Afterthat, we look to see who developed kidney disease from 2006 until 2008. We comparedthe rates of kidney disease among those who took the BZDS and those who didn’t.

Given that - (Example) 12. We select a group of 1,000 middle-aged volunteers without kidney disease…

Answered: 2. We select a group of 1,000…

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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Two different blood pressure medicines are being compared to determine if the average reduction in blood pressure is the same for each medication. The goal of the study is to determine if the medications differ. Twenty men age 50-60 years old are selected for the study. Ten men are chosen at random to receive the first medication and the other 10 men receive the second medication. Each of the 20 men is monitored for one month to determine the change in blood pressure over that time. Minitab provides the 95% confidence interval for (mu1 - mu2) (2.63, 14.18) a. Interpret this 95% CI. b. What assumptions (be specific) are necessary to construct this CI?
A pharmaceutical company is testing the effectiveness of its vaccine across two different age brackets. They take a sample and split the participants up into two separate groups. Group A consists of 44 people who are between ages 13 and 18. Group B consists of 58 people between ages 19 and 26. After being administered the vaccine, it was found that 37 people from group A were immune to the virus and 42 people from group B were immune. (this is the same situation from the previous daily) Why do we use the 'pooled proportion' instead of the null hypothesis in the denominator of the test statistic? At a 10% significance level, is there reason to believe there is a difference in vaccine efficacy between Group A and Group B? explain each step
It has been observed that some persons who suffer colitis, again suffer colitis 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 45 people in the second group and this group will be administered a placebo. After one year, 11% 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 0.1, 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 Hypothesis,…
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You conduct a survey of current exposure to organochlorine pesticides and pregnancy status among 500 fertility patients at a fertility center following them from 2015-2017. Half of those patients are pregnant at the time of survey. Of those who are pregnant, 63 reported using OCPs in their gardens in the last year while they were trying to conceive. Among those who are not pregnant at the time of survey, 40% reported using OCPs in their gardens in the last year while they were trying to conceive. Assume minimal loss to follow-up and no competing risks. a. Which study design is described above? Case-control study Closed cohort study Open cohort study Cross-sectional study Ecologic study None of the above B. Draw a 2x2 table based on the description above. Identify and label the exposure and the outcome. Be sure to include any appropriate totals based on the respective study design.

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