Questions Uploads

national survey

/in /by

Question

national survey is conducted to assess the association between hypertension and stroke in persons over 75

years of age with a family history of stroke. Development of stroke is monitored over a 5 years follow up period. The data are summarized below and the numbers are in millions.

Developed stroke did not develop stroke

Hypertension 12 37

No Hypertension 4 26

A) Compute the cumulative incidence of stroke in persons over 75 years of age Cumulative Incidence=

B) Compute the Relative Risk of stroke in hypertensive as compared to non- hypertensive persons Relative Risk=

C) Compute the Odds Ratio of stroke in hypertensive as compared to non- hypertensive persons Odds Ratio =

 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"

weight-loss programs

/in /by

Question

I need to know the answers to this question:A study is planned to compare two weight-loss programs in

patients who are obese. The first program is based on restricted caloric intake and the second is based on specific food combinations. The study will involve 20 participants and each participant will follow each program. The programs will be assigned in random order (i.e., some participants will first follow the restricted-calorie diet and then follow the food-combination diet, whereas others will first follow the food-combination diet and then follow the restricted-calorie diet). The number of pounds lost will be compared between diets. Identify the type of study proposed and indicate its specific strengths and weaknesses

 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"

data

/in /by

Question

Need to see the work breakdown for this question and answer to the multiple choice after.  The following

data were collected in a clinical trial evaluating a new compound designed to improve wound healing in trauma patients.  The new compound is compared against a placebo.  After treatment for 5 days with the new compound or placebo the extent of wound healing is measured and the data are shown below.

Percent Wound Healing
Treatment0-25%26-50%51-75%76-100%
New Compound ()15373241
Placebo ()36453410

Is there a difference in the extent of wound healing by treatment?  (Hint:  Are treatment and the percent wound healing independent?)  Run the appropriate test at a 5% level of significance.

                    df= ________

               alpha= ________

 Reject H0 if χ2>________

Compute expected frequencies

Expected Frequency = (Row Total * Column Total)/N.

Complete the expected frequencies for each cell.

Percent Wound HealingTotal
Treatment0-25%26-50%51-75%76-100%
New Compound 15(   )37(   )32(   )41(   )125
Placebo 36(   )45(   )34(   )10(   )125
Total51826651250

Compute  χ2.

             χ2= ________

Based on comparing the computed χ2 to the rejection level χ2 which of the following is (are) true?

 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"

A clinical trial

/in /by

Question

A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo.  Participants are

randomly assigned to receive the new treatment or a placebo and the outcome is pain relief within 30 minutes.  The data are shown below.

Pain ReliefNo Pain Relief
New Medication4476
Placebo2199

Is there a significant difference in the proportions of patients reporting pain relief?  Run the test at a 5% level of significance.

Reject H0 if Z <  ________  or if Z > ________

alpha= ________

 = ________

 = ________

  = ________

  Z   = ________

Based on comparing the computed z to the rejection level z which of the following is (are) true?

 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"