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(answered) – 1 Question 1 The following data were collected in a clinical

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(answered) – 1 Question 1 The following data were collected in a clinicalDescriptionSolution downloadThe QuestionI need the answers to the attached questions for my Biostatistics Final tomorrow. Please Help!!!1Question 1The following data were collected in a clinical trial to compare a new drug to a placebo for itseffectiveness in a lowering total serum cholesterol. Generate a 95% confidence interval for thedifference in mean total cholesterol levels between treatments.Men (SD) TotalNew Drug (n=75)185.0 (24.5)Placebo (n=75)204.3 (21.8)Total sample (n=150)194.7 (23.2)Serum Cholesterol% patients with Total78.0%65.0%71.5%Cholesterol < 200A. Upper limitB. Lower limitC. Based on the confidence interval which of the following is (are) true? (a) There is significantevidence, alpha = 0.05, to show that there is a difference in total serum cholesterol betweentreatments New Drug and Placebo (b) There is not significant evidence, alpha = 0.05, to showthat there is a difference in total serum cholesterol between treatments New Drug and Placebo (c)The difference between total cholesterol between treatments New Drug and Placebo isessentially 0 (d) b and c.Question 2A study is designed to investigate whether there is a difference in response to various treatmentsin patients with rheumatoid arthritis. The outcome is patient?s self-reported effect of treatment.The dada are shown below. Are symptoms independent of treatment? Conduct a ChiSquare testat a 5% level of significance.SymptomsTreatment 1Treatment 2Treatment 3Worsened22149A. dfB. critical valueC. computed statisticsNo EffectSymptomsTotal141512Improved1421295050502Based on comparing the computed statistics to the critical value which of the following is (are)true? (a) There is significant evidence, alpha = 0.05, to show that treatment and response are notindependent (b) there is not significant evidence, alpha = 0.05, to show that treatment andresponse are not independent (c) there is significant evidence, alpha = 0.05, to show thattreatment and response are independent (d) b and cQuestion 3An investigator conducts a study to investigate whether there is a difference in means PEF inchildren with chronic bronchitis as compared to those without. Data on PEF are collected andsummarized below. Based on the data, is there statistical evidence of a lower mean PEF inchildren with chronic bronchitis as compared to those without? Apply the two sample t test atalpha = 0.05.GroupChronic BronchitisNo chronic bronchitisNumber of children2525Mean PEF281319Std Dev PEF68741. z 95% confidence interval =2. Upper limit 95% CI =3. Lower limit CI 95% =4. Based on comparing the critical the upper and lower limits of the confidence interval for themean of PEF for children with no Chronic Bronchitis to the mean PEF for children withbronchitis which of the following is (are) true? (a) There is statistical evidence of a lower meanPEF in children with chronic bronchitis as compared to those without (b) There is NOT statisticalevidence of a lower mean PEF in children with chronic bronchitis as compared to those without(c) The confidence interval contains the mean PEF for the No chronic bronchitis group (d) a andcQuestion 4The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes andparticularly in a study of risk factors for obesity. Body mass index is measured as the ratio of weight inkilograms to height in meters squared. Generate a 95% confidence interval estimate of the true BMI. 25,27, 31, 33, 26, 28, 38, 41, 24, 32, 35, 40Upper limit of CI =Lower limit of CI =38. Which o

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