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Problem 4 Suppose 100 hypertensive people are given an antihypertensive drug and the drug is effective...
Suppose we decide a better measure of the effectiveness of the drug is the mean decrease...
Suppose we decide a better measure of the effectiveness of the drug is the mean decrease in blood pressure rather than the measure of effectiveness used previously. Let d i-yi,i 1,.., 100, where z DBP for the ith person before taking the drug and y DBP for the ith person 1 month after taking the drug. Suppose the sample mean of the di is +5.3 and the sample variance is 144.0 1. What is the standard error of d? 2,...
Problem #3: A sample of 128 hypertensive people were given an anti hypertensive drug and the drug...
Problem #3: A sample of 128 hypertensive people were given an anti hypertensive drug and the drug was found to be effective in 52 of those people. (By effective, we mean that their diastolic blood pressure is lowered by at least 10 mm Hg as judged from a repeat measurement taken 1 month after taking the drug.) (a) Find a 94% confidence interval for the true proportion of the sampled population for which the drug is effective (b) Using the...
Some common strategies for treating hypertensive patients by nonpharmacologic methods include (1) weight reduction and (2)...
Some common strategies for treating hypertensive patients by nonpharmacologic methods include (1) weight reduction and (2) trying to get the patient to relax more by meditational or other techniques. These strategies were evaluated by randomizing hypertensive patients to four groups who receive the following types of nonpharmacologic therapy: Group 1: patients receive counselling for both weight reduction and meditation. Group 2: patients receive counselling for weight reduction but not for meditation. Group 3: patients receive counselling for meditation but not...
use first chart to answer questions 18-20 D Question 18 5 pts Suppose 20 hypertensive patients...
use
first chart to answer questions 18-20
D Question 18 5 pts Suppose 20 hypertensive patients are assigned at random to each of four therapy groups, and the change of in diastolic blood pressure (DBP) is noted in these patients after a 1-month period. We want to see whether there is any difference in mean changes in DBP among the therapy groups. The results are given in the following table (please use this table to answer questions 18 through 20):...
In a study to evaluate drug efficacy, the manufacturer of a new type of generic drug...
In a study to evaluate drug efficacy, the manufacturer of a new type of generic drug for treating a disease wants to investigate the effectiveness of this generic drug as compared to the traditional brand name drug, At the present time, the brand name drug is the only approved treatment for the disease. Patients diagnosed with the disease have low concentration of a specific factor in their blood. Treatment with the brand name drug will result in an increase in...
Problem 1 The following data are from a research project on the effectiveness of a drug in reducing LDL chole...
Problem 1 The following data are from a research project on the effectiveness of a drug in reducing LDL cholesterol levels. While some patients in the study are assigned to the drug, others were given a placebo. Because the information about who is receiving the actual drug is kept confidential from those taking LDL measurements, that information is kept in a separate data set. Given below in Data Set A are the initial LDL cholesterol level of each individual before...
4. Suppose you are interested in the effect of an experimental drug on blood pressure. Blood...
4. Suppose you are interested in the effect of an experimental drug on blood pressure. Blood pressures in mmHg are measured before and after treatment from a random sample of 15 participants. The following data result: Pre 134 103 116 113 124 120 128 122 123 108 134 108 111 125 134 Post 134 106 110 115 122 126 130 118 125 110 138 111 115 125 130 a) b) (1 mark) Find a 95% confidence interval for the true...
PPH4801/MPHDHM9 Jan/Feb 2018 16 A study of 100 pabents is perfomed to determine f cholesterol levels...
PPH4801/MPHDHM9 Jan/Feb 2018 16 A study of 100 pabents is perfomed to determine f cholesterol levels are lowered after 3 months of taking a new drug Cholesterol levels are measured on each individual at the beginning of the study and 3 months later The cholesterol change is calculated the value at 3 months minus the value at the beginning of the study On average the cholesterol levels among these 100 patents decreased by 150 and the standard deviation of the...
Part A: Suppose you work for a pharmaceutical company that is testing a new drug to...
Part A: Suppose you work for a pharmaceutical company that is testing a new drug to treat ulcerative colitis. You conduct a random sample of 34 patients on the new drug and 14 of them indicated a decrease in symptoms since starting the drug regimen. You construct a 90% confidence interval for this proportion to be ( 0.2733 , 0.5502 ). What is the correct interpretation of this confidence interval? 1) We are certain that 90% of patients will be...
The null and alternate hypotheses are: A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample...
The null and alternate hypotheses are: A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard deviation of 15. At the 10 significance level, is tiere a difference in the population means? Note: Use the five-step hypothesis testing procedure for the following exercises. (a)This is a two...
Suppose we decide a better measure of the effectiveness of the drug is the mean decrease in blood pressure rather than the measure of effectiveness used previously. Let d i-yi,i 1,.., 100, where z DBP for the ith person before taking the drug and y DBP for the ith person 1 month after taking the drug. Suppose the sample mean of the di is +5.3 and the sample variance is 144.0 1. What is the standard error of d? 2,...
Problem #3: A sample of 128 hypertensive people were given an anti hypertensive drug and the drug was found to be effective in 52 of those people. (By effective, we mean that their diastolic blood pressure is lowered by at least 10 mm Hg as judged from a repeat measurement taken 1 month after taking the drug.) (a) Find a 94% confidence interval for the true proportion of the sampled population for which the drug is effective (b) Using the...
use
first chart to answer questions 18-20
D Question 18 5 pts Suppose 20 hypertensive patients are assigned at random to each of four therapy groups, and the change of in diastolic blood pressure (DBP) is noted in these patients after a 1-month period. We want to see whether there is any difference in mean changes in DBP among the therapy groups. The results are given in the following table (please use this table to answer questions 18 through 20):...
Problem 1 The following data are from a research project on the effectiveness of a drug in reducing LDL cholesterol levels. While some patients in the study are assigned to the drug, others were given a placebo. Because the information about who is receiving the actual drug is kept confidential from those taking LDL measurements, that information is kept in a separate data set. Given below in Data Set A are the initial LDL cholesterol level of each individual before...
4. Suppose you are interested in the effect of an experimental drug on blood pressure. Blood pressures in mmHg are measured before and after treatment from a random sample of 15 participants. The following data result: Pre 134 103 116 113 124 120 128 122 123 108 134 108 111 125 134 Post 134 106 110 115 122 126 130 118 125 110 138 111 115 125 130 a) b) (1 mark) Find a 95% confidence interval for the true...
PPH4801/MPHDHM9 Jan/Feb 2018 16 A study of 100 pabents is perfomed to determine f cholesterol levels are lowered after 3 months of taking a new drug Cholesterol levels are measured on each individual at the beginning of the study and 3 months later The cholesterol change is calculated the value at 3 months minus the value at the beginning of the study On average the cholesterol levels among these 100 patents decreased by 150 and the standard deviation of the...
The null and alternate hypotheses are: A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard deviation of 15. At the 10 significance level, is tiere a difference in the population means? Note: Use the five-step hypothesis testing procedure for the following exercises. (a)This is a two...
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