Project #71336 - Confidence Interval Estimates,Hypothesis Testing Procedures

 

 

5. A clinical trial is conducted to compare a new pain reliever for arthritis to a placebo. Participants are randomly assigned to receive the new medication or a placebo. The outcome is pain relief within 30 minutes. The data are shown in Table 6–8.

 

a. Generate a 95% confidence interval for the proportion of patients on the new medication who report pain relief.

 

b. Generate a 95% confidence interval for the difference in proportions of patients who report pain relief. 

 

 

Table 6–8 Data for Practice Problem 5

Pain Relief

No Pain Relief

New medication            44

 

76

Placebo                          21

 

99 

 

 

 

1. The data in Table 7–6 were collected in a clinical trial to evaluate a new compound designed to improve wound healing in trauma patients. The new compound was compared against a placebo. After treatment for 5 days with the new compound or placebo, the extent of wound healing was measured. Is there a difference in the extent of wound healing between the treatments? (Hint: Are treatment and the percent wound healing independent?) Run the appropriate test at a 5% level of significance. 

 

 

Table7–6 Data for Practice Problems 1 and 2

Percent Wound Healing

Treatment

0–25%

26–50%

51–75%

76–100%

New compound (n = 125)

15

37

32

41

Placebo (n = 125)

36

45

34

10 

 

 

 

 

3. The data in Table 7–7 were collected in an experiment designed to investigate the impact of different positions of pregnant women on fetal heart rate. Fetal heart rate is measured by ultrasound in beats per minute. The study included 20 pregnant women who were assigned to one position and had the fetal heart rate measured in that position. Each woman was between 28 weeks and 32 weeks gestation. Is there a significant difference in mean fetal heart rates by position? Run the test at a 5% level of significance. 

 

 

 

Table7–7 Data for Practice Problem 3

Back

Side

Sitting

Standing

140

141

144

147

144

143

145

145

146

145

147

148

141

144

148

149

139

136

144

145

 

 

 

 

 

4. A clinical trial is conducted to compare a new pain reliever for arthritis to a placebo. Participants are randomly assigned to receive the new medication or a placebo, and the outcome is pain relief within 30 minutes. The data are shown in Table 7–8. Is there a significant difference in the proportions of patients reporting pain relief? Run the test at a 5% level of significance. 

 

 

 

Table7–8 Data for Practice Problem 4

Pain Relief

No Pain Relief

New medication           44

 

76

Placebo                         21

 

99

 

After completing each problem, provide a brief narrative (150–200 words) of the statistical findings. What is your decision rule for each test? Explain your answers and describe anything else about the data that is unique or noteworthy.

Examples of what may be noted in the descriptive narrative include:

  • Sample size issues.
  • Relationship between P and F values.
  • Probabilities associated with chi-square analysis.
  • Degrees of freedom.
  • Confidence intervals.
  • Validity and reliability issues (if any).
  • Measures of central tendency.
  • Parametric and non-parametric data assessment.

Subject Mathematics
Due By (Pacific Time) 05/17/2015 06:30 am
Report DMCA
TutorRating
pallavi

Chat Now!

out of 1971 reviews
More..
amosmm

Chat Now!

out of 766 reviews
More..
PhyzKyd

Chat Now!

out of 1164 reviews
More..
rajdeep77

Chat Now!

out of 721 reviews
More..
sctys

Chat Now!

out of 1600 reviews
More..
sharadgreen

Chat Now!

out of 770 reviews
More..
topnotcher

Chat Now!

out of 766 reviews
More..
XXXIAO

Chat Now!

out of 680 reviews
More..
All Rights Reserved. Copyright by AceMyHW.com - Copyright Policy